Is it possible to merge branch changes in the working directory into trunk working directory only having read-only access to repository?

I have a read-only access to the repository and made many changes into a
very old branch of the project.
This branch was merged (by others) with the trunk few times.
How can I merge my changes back to trunk, and then to the current
version with the minimal efforts?
'svn merge' asks me the revision range that I would like to merge into
trunk (-r XXXX:YYYY), but I can't get a revision number because I can't
check this branch in. It's only a working copy.
My final goal is to make a patch to the current version and submit to
people developing it.

Thank you,
Yuri

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Received on 2009-08-06 01:47:54 CEST