trying to figure out an installation bug

Hi. I am trying to figure out how to install and run Ruby on Rails from
the ruby-lang site.

I installed the 1.9.3 version.

It tells me to install it to C:\oss\ruby

I am supposed to unzip Koans and go to advanced settings and go to
variables. I am supposed to insert a new setting, but it does not tell
me what value to insert when the new window pops up. But you will notice
there are specific values for the other settings already. I presume
there should be a similarly set up value for this one, or do I just make
one up?

I can't tell if that is affecting the set up or not because the only
major problem I run into is this:

I can get the ruby-v file to run, I guess, in the command prompt. I go
to run ruby koans or any other file, executable or not, and the system
says it can not find it. Anyone familiar with how to make a clean
installation with this particular package?

Thanks for any tips.

Btw, I am running windows 7 vista on a dell 1501 in case you need
specifications on the system.

Ruby on Rails on Windows can be problematic (it is much better to use
Linux (eg ubuntu) or Mac). But if you absolutely have to use win then
I understand is a good way to go. You will find it
much more difficult getting help if you are using Win as so few
developers use it.