Connecting to a Broadband connection PPPOE using the command prompt

OK,
I have 2 PCs PC A and PC B
PC A is connected to the internet, but PC B needs access to the internet.
PC A is connected by dialing a Broadband connection PPPOE.
If I set ICS on PC A and make PC B use it then PC A has to be always on.
I wanted to work around this, so I am trying to give the user of PC B 2 shortcuts (to batch files) where first shortcut provides direct connection to the internet (without the presence of PC A). The second would use ICS settings to connect through A to the internet. But since I there is a Broadband connection involved it has to also be setup on B in case of Direct connection. I was trying to connect to this PPPOE by using the batch file.

dsl providers usually include a utility (gui) to connect to the internet.  This is not needed just set up your networking to ppoe requires username/password fill in the information and  check the box to automatically connect.. Some dsl modems you can access the modems internal interface through a web browser and set up the username password in there which aliviates the gui or using the wizard

I cannot let both A and B connect using PPPOE at the same time since only one connection is allowed, so when A is connected through PPPOE B has to go through A.

how are your computers connected?
compa >> dslmodem << compb
dslmodem >> compA >> compb
dslmodem -> router -> compa
                                 ->compb
????

Comp A --> Switch A
Comp B --> Switch B
Switch A --> Switch B
Switch B --> Internet

I also noticed that when I set ICS on A and set B to get IP through DHCP (that is required for ICS), B keeps trying to get IP from the outside (through switch B) and not through A.
So i researched and found that there is a way to make the ip settings on B static, but I noticed that A and B cannot ping each other.
When I ping B from A, I keep getting a reply that B cannot be reached, the reply comes from another Computer, call it P which is the proxy that gives me my internet.
So i am guessing that my ping is not going through my Net Card of the local configuration.
I have these settings on A:
Lan Card 1:
DHCP

Lan Card 2:
IP: 192.168.11.1
Mask: 255.255.255.0

for Computer B (only one card):
IP: 192.168.11.2
Mask: 255.255.255.0
Default Gateway: 192.168.11.1
DNS: 192.168.11.1

So there are other computers on the network that do not require or will have connectivity to the internet..  What is between Switch B and the internet. You could change switch B with a router that allows storing of the PPOE details and not worry about it at the computer end. this will also give you the protection of being behind a NAT router which greatly increases your security from attacks from the Wild and Wolly World of the Internet.

OK, concerning the router, the proxy allows or rejects connections based on the MAC address, so if Computer A has username and password through PPPOE, they will be paired with the MAC.
If I were to use a router would it still work? and where would the Broadband Dialup dialog be at?

most routers ( D-Link in particular) allow you to clone your computers mac address to allow for this.. and it is in the routers configuration (which you access through a web interface)

and PPPOE will be configured on the router? Who dials the connection?
will the connection be always on?

why is it not the best? and what is better?