Not sure about the window kit..... I bought all that stuff for mine but not from the same supplier
As for the drill they make a right angle drill motor for tight spots Harbor Freight has one you can go here to see what they look like.......

http://www.harborfreight.com/cpi/cta...emnumber=92956

most of there stuff is a copy of a name brand so somebody else out there makes them

MM64