Transplanting into one changeset

I'm trying to move changes from a couple of changesets into one changeset on the other branch. There are other changes in between that I want to skip, so I don't want to simply merge everything.

hg transplant moves the changes correctly, but now I'd like to flatten them into a single commit. How can I do that?

You can fold them by

1. Backup the repository, a failure during the process can destroy data
2. transplant the desired changes to the target branch
3. transform them there into a mercurial queue (hg qimport -r first-to-fold-rev:)
4. fold them into one patch (hg qpop until the first patch is applied, then hg qfold <<patch name>> the following patches into this one)
5. Edit the commit message (When there are NO OUTSTANDING CHANGES hg qrefresh -e)
6. apply the single patch to your repository (hg qfinish -a).
7. When there are further unfolded patches:
   1. hg qpush until the head patch
   2. hg qfinish -a
   3. Review the new repo state (hg glog/hg incoming)