[b3lha]

You don't need to remove the assembly or the window. Just remove the door panel and peel back the polythene. You will see the assembly and the drive wire. The regulator is the little plastic clip that joins the drive wire to the assembly.

You just have to slip the regulator over the barrel on the wire and clip it into place on the assembly. You can pull the wire or slide the assembly until they line up for you.

It's a really easy job. Nothing to worry about.

There's a photo in this thread that might give you some idea.
http://www.subaru-svx.net/forum/showthread.php?t=34424