It's actually not too difficult.
With cabs it's even easier, but then you get what's packed into the cab.
Whereas doing like I've done supplying individual files, you can mix and match faces and hands as you please.
If the skinners can do all the work to make these, you guys should be able to copy a file from one folder to another.
On another note, an automated process has been discussed.
I've also attached the original hands in my clock thread, and seeing how I made the original clock, I will attach that there as well.
Then you can always revert back.
I've also found MaxTTM 4.1 will do this as well.
Just don't use it for it's other features, except to skin the top and bottom bars, along with BG4all.