First, get bazaar. Because we have no gcc ability, we need to set up a config file to change some values in. First create ~/.pydistutils.cfg. You need to add the lines:

[build_ext]
allow-python-fallback=1

This now allows us to build bazaar:

easy_install --prefix=~ bzr

With Bazaar installed fetch the latest version of trac-bzr:

bzr branch lp:trac-bzr

You then need to set it up. Navigate to the trac-bzr folder and run:

python setup.py install --prefix=~

Once installed, you need to add/change some lines in your trac.ini file.

Add
tracbzr.* = enabled

To the components section and

Change
repository_dir = /your/repository/location
repository_type = bzr

Once that is complete, you need to get the stuff into your repository. First run bzr repo-init and then change to your working repository and run bzr push sftp:/location/of/repo.