looking for help in VBScript with Active directory

I need help with a script for AD. I have to move users in a global group into a Universal Group. The users are in three global groups and are in turn nested in a global group, 16k+ groups of these are then nested in the target Universal Group.
I need to iterate through the global groups to the other global groups and add the users into the Universal group then remove the global groups on the second level from the universal group without deleting them.
Thank you in advance for your assistance.