I can help
Ok man... I have the same setup...and had the same problem... try this... open etc/modules.conf (use vi)
there should be a line
alias sound-slot-1 i810 audio (or similar you will find it)
change the -1 to -0 (zero) and save... restart and you "should" have sound...
I am running RH7.3 .18_3 and have sound, vid and lan all working...
hope this helps