Hi, all, thanks for the help. :)
The guy who agreed to trade me the older Linux machine he would set up for the new one insists on doing the trade 'instantly.' I offered to give him cash money ($200) to hold (just for 1-2 days, then trade the cash for the new PC), just while I make sure the new system is stable for me, but he won't even do that. That made me anxious. (People who don't trust other people that way are the ones who rip us off, most of the time.)
So the new plan is I'll install Linux on this new machine, maybe as a dual boot. (This means partitioning the 160g drive, since it's ATA and my other hd's are all IDE.) If I can get Linux working well, I'll then either trade him for the older machine, or get an older used machine myself, get that running Linux too, and then sell this one.
This machine is too powerful and big for me to waste it just visiting a few web sites and playing chess (with human opponents!), and watching an occasional DVD. Someone who could really use its capabilities should have it. :) The only software that came with it is 'Nero,' so I guess it's for high-powered graphics users or film people; I haven't even used Nero myself, since the machine had PowerDVD installed already.
I like the idea of buying the router, but the last time I visited the Goodwill outlet, they didn't have one. So, I read the first 4 modules of the Linux course and I'm ready to get started. Might as well start with Mephis since it's already on this CD I have. I'll let y'all know how it goes....