Well, I too want to congratulate you on your new endeavor. Trust me...once you figure it out, you'll never buy a regular computer again. Anyway, here are some guides to start you off (if you haven't yet read or seen them):
Tom's Hardware Guide How-To: Do It Yourself PC System
PC Mechanic's "Build Your Own PC"
Hardware Central's "Build Your Own PC"
Tweak3D.net's 3-Part guide "How To Build A Computer"
PCWorld.com's "Build Your Own PC"
BuildEasyPC Step by Step Building Guide
It looks like you have a good system, but I'm not sure about that IBM 60GXP. There's been some problems with the 75GXP series, and now some are starting to show with these as well. Is it possible to return it and get perhaps a Maxtor D740 from
Newegg.com for $88? I think those were supposed to be pretty good, especially with it's Fluid Dynamic Bearing Motors.
Also, since I see you're gonna be using Windows 98SE, it and other Win9x/ME operating systems has problems with memory 512MB+. So,
Cacheman fixes this limitation. Run through all the wizards to optimize your system. (for future reference) This post shows a good explanation from
Toejam31 -
Link
Some tips while building (in no particular order):
1) Take your time. Don't rush it, because you might find out that in your haste, you shorted a component out.
2) Make sure everything is secure. You don't want something loose, like an IDE cable, power connector, processor, HSF, PCI cards, hard drive...
3) Have all the tools you need around you, so that you don't have to get up and find it.
4) Get a plate or bowl to place all the screws and tiny hardware in.
5) Place the components (processor, memory, video card) on top of their anti-static bags, so they're ready to go.
6) If the case has direction, it'd be in your best interest to read them, so you know how the case structure works.
7) Put all the manuals and CDs that came with your components, plus any invoices and packing slips at your desk filed away. You should always have them for future reference (if the need arises).
8) Save the boxes. If something comes up, it'll save you time and money. I'd specifically save the motherboard box, especially since it's one of the retail items people buy. If you buy anything else retail, save that box as well, until you're certain you can throw it away.
(Okay, I didn't think I'd have 8 tips, but every little bit helps, right?)
It's interesting to see how other people recommend to build a computer. When I built my first computer, I just put everything in
carefully, then booted, flashed the BIOS, formatted the HD, and installed Windows. When I built the two for my friends after that, I did the exact same thing, except I didn't take as much time, knowing more how to go about it. It didn't mean that I wasn't cautious, but I wasn't as scared to mess up. One thing I do remember was that I was kinda shaky, and I needed a fan blowing on me to cool off.
Try to have fun, and don't sweat it. I'm sure you'll be fine.
