Ubuntu 8.10 wired and wireless not working

I have a used HP Pavilion 7936 PC that was running WinXP just fine. It's my play machine to try Ubuntu so after downloading and burning Ubuntu to a CD I used it to reformat the HDD and install it. It's up and running but it doesn't see the integrated ethernet port at all, even tho it was working fine with XPt. So I started working on the wireless. The problem is I use a 64bit WEP key on a DLink wireless 620 router that has 64/128 hex keys. The Ubuntu wireless config wants a 40/128 bit key . I don't want to change all my PCs to a 128bit key (I've had problems with some of them using 128bit, but not 64bit).

So there's my problems. An integrated ethernet that isn't discovered, a wireless router that doesn't support 40bit WEP keys and a reluctance to reconfig everything to 128bit key.

I'd really like to resolve the ethernet issue. I don't need this PC to use wireless, it was just a backup plan. So, any troubleshooting I can do for the wired stuff? "ifconfig -a" only shows the loopback and pan0 items. Nothing else. I reviewed "dmesg" output and there's no "eth0" entry. I don't know how HP labels their wired ports so no help there.

 Help!

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