Hand-rolling migration to Git

Hi!

I am looking for documentation on how to hand-roll a conversion to Git, but I keep getting lost in the maze of similar-looking man pages. Is there a tutorial, howto, or perhaps even just a list of recommended man pages to read on importing project changes to Git?

I have projects of two different kinds that I need to import:

1. The "make a copy of the source code directory and edit the new copy"
source management system. I need to be able to import one directory at
a time, each describing a version controlled state. The date stamp on
the commits should probably be the most recent file in each directory.

2. A piece of software using PVCS (a RCS-like version control system
with added support for parallel development (using a locking model)). I
have a complete "trail file" which lists all commits done to the
repository in chronological order since the repository was created, and
can use that as a base. Since it has no concept of an atomic commit, I
need to semi-manually join commits by walking the trail file and
comparing lock sets, time stamps, commit messages and authors.

I can probably make the output from (2) look like from (1), so I basically just need to find a pointer to information on how to (re-)create the history with Git.