Hi Scott
Don’t panic, you can try Win 98 compatibility mode, and if this doesn’t work you can still network your old computer to the new one, (You may need to buy a network adaptor) just use the Networking Wizard in Vista to set it up, it will even make up a disc that you can run on your old computer, so as to set it up for you.
Alternatively use a USB stick to transfer the finished files to the new computer. (As your old computer is Win 98 it is probably USB 1.1 rather then the latest USB 2, so the transfer speed will be slow)
Hope this helps

Bill