Strange, most programs give you an option or auto-install to the drive the install file is on.
What are you trying to install?
It's a game which has been downloaded from a torrent. And has been packaged (Cracked) into one file. I have opened it with winrar and installing from there starts of normally, giving me the option of which drive to install to but then fails because it can't find all of the data.
The other starts to install fine though, and only fails when I run out of space. It's obviously put together to avoid the copyright palava.
Any ideas, asides from stop being a cheap cunt and buy the game of course.