I think you got all you'll get.
160GB drive from manufacture ~ 149GB in Windows, follow my math:
1024B = 1KB, 1024KB =1MB, 1024MB=1GB, so that's 1,073,741,824B in a GB, x 149 = ~160GB.
You've got 149.05GB of drive space. A little (very little) is used to partion.
They use base10, Windows uses base 8.
Ugh, ok, thats fine, just was wondering where it all went, thanks!