I dont think you need to redirect anything, its just a setting on your pc. Look in the partnership settings and you should be able to sync files. In there you will be able to set what files or folders I imagine. Or you could delete the partnership and recreate it and it should ask you want you want to sync. I haven't used activesync in awhile, only WMDC the vista/windows 7 equivalent to activesync.
I'm not sure about a registry editor for the computer, you could use mymobiler and just view the phone screen right on your pc.
www.mymobiler.com