Does it matter that i got the TOH kernel?

and theres no way I can use onboard sound, no external kext or anything?

EDIT:

Well I cant boot into my leo install....I get "chain booting error" im using easy bsc to do it, I didnt manually choose because it said I might not be able to boot vista but on a side note I need dual booting help all the guides iv found dont work....

I have leopard on disk0s1
and vista on disc0s2