skwee wrote:
However, I will ask a question, if anyone is still out there listening: Without having put a partition on this machine when it was new, can you do one on the fly now, or would I have to start with a clean install?
The answer's a qualified 'maybe'.
DU in SL can be used to repartition on the fly to a limited extent, but it requires that the existing data on the drive is all in the first part of the drive; i.e. a contiguous block leaving empty space to use for the new partiton. Given your description of your work, that's probably not going to be the case.
As the best solution to that involves making a bootable clone to an external HD (which you really should already have as a backup anyway with all that expensive software), and then cloning it back, that would wipe the internal anyway, so you may as well use DU from the clone to do the partitioning before cloning back.