"desgnr" wrote in message
I herd there is a 1/2" lip around the exterior side of the window which
will stop me from pulling the window into interior side.
Any suggestions appreciated.

Yep, not an easy chore because of that lip. You may be able to pull the
frame towards then center of the window and collapse it so it will pull out
a side at a time, but then again, you may not. You can try cutting the
frame with a reciprocating saw to weaken it, but you may end up making a
terrible mess if you don't have success.