LOL, I think you mean a harddrive? Like memory to store stuff? If that's the case, you need a new harddrive. QUite easy to install and you can find them at most any computer store
V-Mem is a bit of space on your harddrive dedicated for RAM usage. Most computer don't have a enough ram to run programs. Say a prog requires 300 megs, and you have 256M system ram. You're computer will take the difference and use some of you're harddrive for it.
Desktop: Athlon 64 3700, 1024M RAM, GF 6200 TC 256M, 2x 80G, 2x DVD-RW
Laptop: Sempron 2800, 512M RAM, Unichrome, 60G, DVD-RW
Macintosh:G4 1.33GHz, 512M RAM, Radeon 9200 32M, 40G, DVD/CDRW
They get me from 0 to 1...