Selectively commit/publish files to GIT

Hi,

  I've converting my Bazaar repository to GIT.

 I've successfully done this conversion and I now want to publish my
source code to github.

  The problem is that in Bazaar, I've commited some big files (63MB &
173MB), but this files are no longer in my project, only in the
revisions files of Bazaar and now Git.

  I don't need this files to be pushed on Github.

  How can I search git history for big files and remove them, or mark
them to be not published ?

I've tryed this solution found on the link in the error:

git filter-branch --force --index-filter 'git rm --cached --ignore-unmatch giant_file' --prune-empty --tag-name-filter cat -- --all git commit --amend -CHEAD

Then I've tryed to Commit & Push from Github mac application and I had several network error, and finally get the same error on giant files (maybe my multiple commit & push did override something, but I understood that the git rm command would remove things once for good...

can anybody help me ? I'm blocked in my dev because of this, I can't share my project with a friend. I'm publishing here : https://github.com/dev-mansonthomas/crf-rdp.git (paying for storage is an option as I'm quite fed up loosing time for filesize...)

Regards, Thomas.

here is the error I have using the GitHub application on Mac : (after that I intend to use Eclipse)

File Ressources/dwr/dwr-3.0.0.110.dev-src.zip is 67.69 MB; this is
larger than GitHub's recommended maximum file size of 50 MB
GH001: Large files detected.
Trace: 8f0259b29260f0c4d7ae4d4ae70e0306
See http://git.io/iEPt8g for more information.
File .bzr/repository/packs/a7bcd6ba235114ab88c80fe8a97adcfa.pack is
178.76 MB; this exceeds GitHub's file size limit of 100 MB