How Do I Install Ruby Gems on a USB Stick

Question

How would one install rubygems on a usb stick so that it would work like it would normally, but all files go on the stick? I have no experience at all with rubygems and have no idea of its inner workings, so please, go easy on me! Thanks in advance, ell.

Edit: Basically, so it is entirely portable!

Answer 1

Set the $GEM_HOME environment variable to the path where you mounted your usb stick and mine away!

Although for it to be portable you'd have to set $GEM_HOME env-variable on other "host" machines as well.