Using the IBM Installation Manager Update manager

Hello,
Congrats on a novel use of Eclipse.

First, can the IBM installation manager be used to update any site, or is it restricted to the Jazz site only?

I asked because I attempted to update the following URL - http://dist.codehaus.org/groovy/distributions/updateDev/ - by running the installation manger > File > Preference > Add Repository and placed the URL there. However, it will not connect.

I tried several other working update sites with the same result.

I then boot the Team Concert and use the Ecipse Update Manager and I connectd to all the above sites without any problem.

Let me know if I am using the software correctly please.