Setting up Shaw@home on RedHat 6.0

I'm a new user to linux, and I haven't been able to get my ethernet card, or my shaw@home internet account to work.  I'm very new, and honestly I'm not even sure if my ethernet card is even set up with Linux.  My ethernet card is an old 3com "3C509B-COMBO".  Originally the card was set up for coax, but when I changed the card to dhcp, it failed to work.  I have internet working on Windows 98 ( boo, hiss ) so if need be I can download files.
Thank you for you time.
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"Originally the card was set up for coax, but when I changed the card to dhcp"  one has NOTHING to do with the other ;)  

Get a dos boot floppy, then use the 3c5x9cfg.exe to:

1. Disable PnP on the 509
2. Set resources to I/O 300, IRQ10
3. Select the right tranceiver (Coax / YP)
4. Disable Full duplex
5. (if nescessary) tell system BIOS that IRQ10 is now a Non PnP device

then boot linux, and tell the card to use DHCP.

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