Ya, so we are agreed on the synch issue. I like using scripts instead of GPO's for a number of reasons. The top of the list would be the following:
Logon time with scripts much faster than gpo's
It is so much quicker to find the setting to change in the script than hunting for it in the gpo's.
copying one script to all my clients is as simple as copy and paste. Copying the gpo settings from one client to the next, while not difficult is not as quick as copy and paste for the script.
Customisability is a huge one if you have clients with different operating systems which I have had over the years, although all my clients are now on windows 7.
A script can do everything, whereas with a gpo, there are some things that only a script can do!
I think this issue is kinda like windows versus mac or chrome versus firefox. I just don't like GPO's as I find scripts can do more for me. The script that I have now does absolutely everything I want it to do.

I only need 8 restricted registry keys to be set per user, hence my post called "step by step guide to running script with elevated privileges" or whatever I called the post.

anway, not to distract the OP from the original question as the poor man needs his mapped drives lol