snow leopard windows 7 boot camp drivers

1: Since i have partioned 32 gigs of my 600 gig harddrive to windows from my mac i wouldnt think i would really need the storage. But i use windows a lot now because of gaming ect and i need more gigs. is there a way to partition more gigs without uninstalling windows

2: Ever since i put windows 7 on my mac the drivers for the sound dont work. and i put the installer disk to make the drivers work but they didnt. i downloaded every update i could but no. My mac still has sound but windows doesnt

i am running Snow Leopard and Windows 7.

thanks!