Hello all.  Can anyone point me in the right direction on how to back up my recorded TV schedule, so that i can move it to a new windows install.

The recording schedule is maintained in a file called recordings.xml. All you need to do is search for the file, save a copy and then replace the file with the copy on your new build. This only works on Vista and earlier versions of media center. Windows 7 uses a new format and I'm not aware of any way to restore an older version to Windows 7.

is this true of TV Pack as well?

If memory serves me correctly TV Pack relies on the same recorded TV backend as Windows 7, so it is unlikely that this will work.

TV Pack and later store the schedule in a database. I have not read of any reliable way to backup/restore the database yet. Am hoping that MS (or someone) comes up with a migration facility to convert data from the old xml file format to the new database format.