To start with, all I had was this instructional post. Sounds really easy and would not merit a post of it's own, if it wasn't for a bug in MSysGit.
Here's what I did to work around:
- Download the latest version of Ubuntu.
- Burn it on a CD.
- Reboot from the CD, using "Live CD" mode.
- Install git via the "Synaptic Package Manager"
- Still in the "Synaptic Package Manager", activate the "universe"-repository and install mercurial.
- Mount my hard drive so I have access to the hg's working copy.
- Follow the instructions from the post - but do everything in the user home.
- Finally, copy the resulting repository onto my harddrive
- Reboot into Windows.
Edit: Rob Rutherford suggests using Virtual Box and your personal flavor of Linux for a more persistent solution.
Edit: Or just boot Virtual Box with the ISO image I linked to above.