ok i installed debian 3.1 on another hardrive and am runnign it now but i want to change screen size and i dont have alot of options. how can i make the screen size smaller ???

Smaller? Do you actually mean a smaller resolution?

Or is your resolution like 320x200 or something?

In the first case, just add modelines to the X configuration file (/etc/X11/Xorg.conf IIRC). In the second, you're doomed, since that means your video card is not supported, at least not currently.