too many files in instant rails

Hi
I've put instant rails on my Disk on key and because of the amount of
files it takes 1.5 giga of space.
I'm guessing i probably don't need all those files. which one can i
delete to lower the files count ? (help, source ...)

Thanks

my entire ruby directory is 330M, with 2 rails versions and several
gems I probably don't need. mysql is another 250M, ad apache2 about
80M. I did not use instant rails though.

You can try installing ruby, rails, and mysql (or sqlite3)
separately.