How to make a soundfont for FL Studio?

[NeonGaming]

I have the WAVs, but I can't find a good program to make them into a huge soundfont for a remix I'm making. (World 8 of SMB3)

I tried Vienna, but it won't boot because there is no SoundFont Compatible Device inserted. I think it may be the lack of a proper sound card, but I don't really know.

EDIT: Just found that I have Awave Studio, but I'm not entirely sure on how to use it or if I can make SF2 files with it. Used it before for ripping, it's a funny story.