Sorry, I don't know anything about soundfonts. I know about setting up sound cards, but something like that is something I wouldn't think would screw them up.
if you know the name of one of the files then you can go in a terminal:
find / 2> /dev/null | grep name.of.file
and find the location of the installed files, then you can mv them out of there.
Try one of the Suse forums for help, with Yast stuff that is a Suse-only application and I dont' have any suse machines around at the momement....
I've been looking up stuff about soundfonts. They are for midi sound, right? I think they get installed in:
/usr/share/sounds/sf2/
Although the ones for your sound card from the driver cd should work....
However Audigy 2 is a bit different and since people don't do midi sound much anymore it's not realy tested (I am guessing).
What happenned when you tried to open up alsamixer?