Do you have OD as well as AD? If you, you can create a share point in OD and map it that way. I also believe you can map the home folders with the AD plug in on the AD side as well, but I don't have AD to test this with.
As for the scripts, just modify them to the new location of the home folder, or have a log in hook that when a user firsts logs in, it creates a symbolic link form /Users/Username to where ever the new home folder lives.
