Mmm, i havn't looked for a copy off ff9, but i recently embarked on a simular quest, for ff8.
Took a few hours of tweaking but i finally got the old ass game to work with EPSXE on my vista rig.
Just download epsxe from emulator zone or its main site,
http://www.ngemu.com/
Basicly through downloading the emulator go into the help file and it should explain everything you need to get it running. There are some special tweaks to get ff9 to work iirc, but they should be listed on the site and in the help file. Good luck, if you have any questions / problems PM me