I think there is something I don't know about MC. Suppose I have a whole package. I modified some clases. But I don't want to commit  some of those changes. If I see diff mode, I can see the diffs, but, If I commit, I commit all. Not only the changes I want. To do that, I have to override the rest of the changes so that not to commit them. And, If I do this, I loose those changes. So, I have to backup those changes in a file, then commit, and recover the changes again.

I mean, I would like something like CVS or SVN where you can commit what you want, no the whole package.

I don't know If I could express myself. Sorry for my English.