installing sql 2005 management studio express on 2nd hard drive

Hi,

I've downloaded the sql server 2005 management studio express executable to my second hard drive, as there is no room on my main drive

However, when I try to install, the program shows me both drives, and shows that there is not enough room on my main drive, but it does not allow me to change the installation to my second drive.

I have previously installed the main sql express product to my second drive with visual studio. There's loads of room.

Can anyone give me a clue as to why this might be happening.

Thanks

John

I'm going to move this to the Setup forum.

- Mike