Ok, I am not sure if this came from Eclipse 3.4 or this is something Rational added but I absolutely love it!
Now, I don't have to change all of the manifests to provide patches or export my plugins to a configured runtime. This is going to save so much time and get rid of a big headache.
What the feature does is automatically replace “.qualifier” with what you specify in the field to the right. I matched it to my Notes 8.5 install for the property broker plugin. Very cool.