I HAD to post here when I read this thread. I get very frustrated with folks who tend to bash MS simply because they're the business machine that they are. I also get frustrated with people who hang on to ANCIENT operating systems, for one reason or another. But just consider this: how long is a company supposed to support old products? Note that most hardware vendors stop supporting hardware with new drivers at about 5 years, with the larger companies holding onto archive drivers and the like for older hardware. But they move on, as the computer industry is wont to do.
Now, think of all the 'nix users out there. How often do they update their OS to the most recent version available? And most 'nix users will answer: constantly. They're do-it-yourselfers, and they take pride in having an updated, smoothly-running computer. Take the same pride that they do, and you'll find yourself complaining less and less about things such as software that isn't backwards-compatible.
Upgrade your computer. Software and hardware grows *together.* If you have an OS that was released in 2001, you can bet that it wasn't designed to run on hardware from 1995. Try and keep your operating system at least 3-5 years old, and no older (yes, I'm aware that 98SE is only about 4-5 years old, but that's *still* at the end of that time span, and to expect a company to feel obligated to a customer that hasn't shelled out cash in 5 years is ludicris). Yes, I understand that it would be very *nice* of Microsoft to give it's customers free upgrades for life, but I just don't see it happening. Plant a new proc in your system, give yourself some more RAM, and upgrade your OS. Defrag....clean your registry. Make your computer a happy place to play

Also, you stated that the proc requirements for WM9 are very high. Now granted that they are, but also note that those are the *reccomended* stats for *broadcast*. That means a system which can comfortably encode both video and audio streams simultaneously, realtime (1X). If you want to broadcast DivX with sound, it'll require a good bit of processing power, too. WM9 encodes just fine on lower-end systems, you just can't *broadcast* on those systems. And many of these broadcast streams are pretty intense. The video streams are difficult enough to encode real-time, but the audio streams can support up to 6 channels of stereo sound...that's a good deal of data to get crunched, when you throw it at your PC all at once.
And last, but not least: I've been purposely overlooking one detail here: you might not *have* the funds to upgrade your computer, in which case I'm afraid you're SOL and need to get a(nother) job. :-P j/k, actually I'm sure you can find a "free" copy of XP somewhere, and used computer hardware is rediculously cheap. But whatever

I'm not sure why anyone other than professional internet broadcasters and home video nuts would be interested in the format anyway. Good luck!