I have a 64bit Vista laptop with no CD drive (and no intention of buying one).

What is the simplest way (if any) for me to dual boot Linux (I don't care what version as long as it's not too old...and will run Ruby 1.8.7 or greater)?

I'd prefer anything with an installer.

I've been programming on Windows for a little over 1.5 years and would like the option of using Linux. I'm not a moron, but the I'm legitimately scared of messing up my computer. I speak the language of Rails, not of OS tweaks.

Thanks!

**UPDATE:** I'm going the VM route using Virtual Box. Any recommendations for Linux isos? I'm currently trying to install Ubuntu 9.something. Is there anything in 10.x that I'm missing? All I want to do with Linux is write Ruby programs.

**UPDATE II:** I ended up downloading Wubi to install Ubuntu 10.x. It's looking really good! No problems with drivers (with my logitech wireless mouse and keyboard + external monitor).

I have a new slight problem :/
I installed Ruby according to <http://www.ruby-lang.org/en/downloads/>
It says to get IRB (Ruby's console) working, I need to "enable the universe repository". How do I do that?!