How/can I route to another network through Linksys and Netgear routers

The linksys router (wrt54g) is currently the only router whose wan port is connected to the internet (cable modem). The linksys lan ip is 192.168.3.1. The netgear's wan port is currently plugged into a lan port on the linksys. Netgear wan ip is 192.168.3.50. The lan network on the netgear is 192.168.88.0. The netgear provides access to this network via it's connection to the linksys router. I am trying to get to a share \\192.168.88.88\QB on the netgear lan from a computer (192.168.3.88) on the linksys lan. I've tried unsuccessfully adding various routes but have had no luck. I'm not sure whether I need to add routes to the routers, the computers or both. I'm not even sure if this configuration will work with these type routers. I'm using this as a temporary setup until the ISP hooks up internet connectivity for the Netgear, but even when this is done I plan to connect a lan port from the netgear to the linksys and allow 192.168.3.88 to connect to the share \\192.168.88.88\QB. I'm trying to keep them on separate networks because they are separate businesses with the need to only share one file.
bwierzbickiAsked:
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akahanCommented:
If you set the subnet mask on ALL the machines on your network (PC's, routers, printers, etc.) to 255.255.0.0 instead of 255.255.255.0 that should enable you to access shared files on one of those subnets from machines on the other.   Essentially, you'd be making it all into a single network, which is not ENTIRELY consistent with wanting to keep it "separate" for the two businesses.  

But that's kind of a bother, because you have to have the same subnet mask on EVERY machine on your network, and for all I know you have a LOT of machines.

Another alternative would be to install Hamachi (free, from logmein.com) on the two machines that need to access one another's files.  Put them in the same Hamachi network, problem solved.  That way, those two machines will be able to access shared files on one another, but all the other machines on the network will not be able to participate; the two networks will otherwise remain isolated from one another, as you want.


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bwierzbickiAuthor Commented:
Hamachi looks like a pretty good option and I'm considering it. It definitely looks like a solution for another project I'm working on, thanks for the suggestion.

I still feel like I'd like to keep this on in house though. What about this:

1.Turn off DHCP on both routers and give all pc's and devices static ip's.
2.Connect the lan ports of the netgear and linksys, effictively making them the same physical network.
3. Add a second ip to one of the machines that needs to connect to the other (i.e. the pc that is 192.168.88.88 would also have an ip of 192.168.3.87, allowing it to connect to the pc that is 192.168.3.88)

At the point this is done I will have seperate internet connections on the 192.168.3.0 network and the 192.168.88.0 network (linksys and netgear)

One computer woud be able to browse the others network, but that network only has 2 pc's on it as opposed to the other's 11 so I could keep things private with hidden shares easily on the 2 pc network.
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akahanCommented:
Unless you change the subnet masks throughout your network as I had suggested, I *think*  your proposal would not work.  Hamachi's going to be much easier!

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bwierzbickiAuthor Commented:
I went with Hamachi. It was easy and I did it all remotely since I already had logmein access.
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bwierzbickiAuthor Commented:
Thanks for the help. This will work for another application. Wow, 2 for the price of one.
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akahanCommented:
Thanks for letting me know.  Hamachi's pretty cool, eh?
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