download LCD density changer from the android market you most probably need root access
change the dpi to 180 (lower the number smaller the icons and overall appearance)
you can do this manually by modifying the build.prop file with a text editor (root explorer)
build.prop is found in /system you will need root access for this too

root explorer---- untested unverified, use with caution
http://www.megaupload.com/?d=1F72L1VC