I don't know about the "other" but there's other 3rd party programs you can use to add to your iPod you should check out 1st. 1.
How to transfer music to my iPod (& iTunes) (mostly applies to but not only windows), 2.
How to transfer music to my iPod (& iTunes) for mac users
ie: visit the iPod or iTunes forum sections & see what's available for 3rd party apps for adding to iPod. Else, you can ask them. If you find the answer, can you post it here for the sake of others.
Oh I just realised why I felt confused in my posting. You're using Win 98 & you're posting in the general mac section. Wrong section!!! I'm not sure iPod will recognise win 98, you'll need to check!!!