I too have an elderly (5 years old) and not very fancy PC running Windows 98, and I've had LOTS of trouble with wav files on it. I found all the software needed to rip CD tracks, convert to mp3, record directly through the mic input, upload from mini-disk and whatever. The problem is that my wav files end up with skips in the sound. Nothing I've tried (and I've wasted many, many, many hours trying) has solved this problem, including the recent waste of time downloading the upgrade to the sound card driver.

I guess what I'm really saying here is that the quality you end up with may not be adequate, because the old PC may not have enough speed or memory or whatever it takes to handle this kind of use effectively. Good luck!