I've never done the power windows on a car befor. Regulator and motor. Going to give it a go on my 1989 w250. Can anyone tell me how the window glass attaches to the sissor part that raises and lowers the glass?

 

Just remove the door panel and look. Seriously. I don't have a manual.
One thing that might help is to look at an online parts catalog.
http://www.lmctruck.com/icatalog/dc/full.aspx?Page=13

 

Since they do it for a LIVING, consider having your local Safelite or other auto glass shop take a look at it. Insurance may even cover part of it, and letting the experts handle it, means less of a chance of a screwup that you'll hafta pay TWICE for in the long run.

 

It ain't rocket science.