Priority of wired and wireless networks

My office broadband is down for few days and my two colleagues and I are using an EE Osprey wireless dongle to access the internet/email.  

I feel that there must be a simple solution to the issue but it is beyond me.

The wireless connection only seems to work if I disable my wired LAN. However my wired LAN connects me to a Network Access Server drive and printers (and the out of order ADSL modem) via a switch.    This means I cannot access the NAS drive which holds the office files or print to the printers.  The others are not set up on the wireless let but I assume they will have the same issue.

Whilst I can keep enabling and disabling the LAN that is  real pain for obvious reasons.

We do NOT run any back office or Exchange Server software it is a simple cat 5 structured cabling connection with printers and NAS on fixed IP addresses via an SMC switch.

Can I set it up so that Outlook and IE use the wireless connection but keep the wired LAN live so I can print etc? How do I force them to use the wireless instead of the wired connection?

We have three PCS.  I am using XP and Outlook 2003 and the others use Windows 7 Ultimate and office 2010.
LawyerLudditesolicitorAsked:
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Natty GregIn Theory (IT)Commented:
all os defaults to wired when present its the preferred network, however there are 2 ways to get wireless, un plug the Ethernet cable it will default to wireless or disable the Ethernet card.

for you to access the share all device must share the same network or for complex situation a router must be involved to route traffic
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LawyerLudditesolicitorAuthor Commented:
That doesn't really answer my question.  I know I can uplug the wired network but how can I then acces the shared NAS driver and printers?
Surely I can tell Outlook and IE to use the wireless connection instead of the wired, thus leaving me free to access the wired network when I need to?
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Natty GregIn Theory (IT)Commented:
as long as the NAS driver and printer are shared on the same network you can access them via start-run and in the dialog box type

To Connect to a Shared Folder with the UNC Format

    Click Start, and then click Run.
    Type the share name by using the UNC format (\\servername\sharename), and then click OK. Windows 2000 displays all of the shared folders and printers on that computer.
    Double-click the shared folder to access the shared files.
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PerarduaadastraCommented:
Why not just set the IP address of the device the dongle is connected to as the proxy server in IE, under Internet Options -> Connections -> LAN settings? If you ensure that the Bypass proxy server for local addresses is ticked then IE should work at least, and possibly Outlook too if it gets its connection information from that browser setting.
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LawyerLudditesolicitorAuthor Commented:
I still think you are answering a different question.  I can connect to the printers and devices fine if the wired network card is plugged in or enabled.  There is no way to connect to them via the seprate unconnected wireless broadband modem because that is a temporary stand alone device with no ports or anything to connect it to the wired network, NAS or printers or the switch.
There is NO SERVER by the way as I said before.

What I want to do is keep my wired connection to access the NAS/Printers but be able to use the free standing wireless modem to access the internet/email.   This requires IE and Outlook to connect through the wireless connection rather than try (and fail) through the wired connection.  How can I achieve that?
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Natty GregIn Theory (IT)Commented:
For that you will need a router.
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LawyerLudditesolicitorAuthor Commented:
Perarduaadastra
Just seen your comment. The dongle is not connected to anything apart from a power socket.  it is a free standing 4G wireless modem with a simm card in it - i have no idea if it has an ip address or how to find out what it might be
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LawyerLudditesolicitorAuthor Commented:
How is a router going to help - I cannot connect the broadband modem to it unless it can be done wirelessly?  I have two routers - the BT broadband one that is not currently connected and a Billion router (currently not in use) but I cannot see how I physically connect them?
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Natty GregIn Theory (IT)Commented:
you will have given each device a static ip address, disable dhcp on the router and leave WiFi connected, it will say on the LAN side limited connection just ignore you're still able to use land resources while your able to get email via WiFi
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Natty GregIn Theory (IT)Commented:
some routers use sim card or usb
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Natty GregIn Theory (IT)Commented:
they are expensive though
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PerarduaadastraCommented:
There seems to be very little meaningful technical information available for this device. As far as I know, it comes with a USB cable which is used for charging, but have you tried using it to connect the Osprey to a computer? There may be installable software on the dongle which would allow you to use that computer as your combined internet gateway/WAP until your fixed connection was up and running again.
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footechCommented:
On your machine, try removing the default gateway from your NIC settings for the wired interface.
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