Rational Team Concert 3.0: Is there a way to check-in changes in multiple components at once (with the same comment)?

I maintain build files in our project and I often need to make related changes in projects spread to multiple components. Currently, I check-in (using Eclipse plugin) each component separately, pasting in the same comment.

Is there a way to do it at once for all the components loaded to my workspace?

I think you're asking two questions:

1. Can I commit into multiple components at once?
2. Can I set the comment on multiple change sets at once?

To commit everything, you can hit the Check-in All Pending Changes button, which looks like:

To set the comment on multiple change sets, select them and hit F2. It may be easier to switch views to the "change set oriented view" by clicking on the delta dropdown (second from the left on the image above).