I noticed on 737NGs (haven't flown the classic recently to notice) that there are stall strips on the leading edge of the wing just inboard of the engines in the same area where the Krueger flaps are. I know the purpose of the stall strips is to make that part of the wing (inboard) stall before the rest of the wing (outboard) to ensure control is maintained by the ailerons throughout the stall regime. However, I also noticed that when the Krueger flaps are deployed that they cover the stall strips.
So, my question is, how is control maintained by the ailerons if the wing stalls when the leading edge flaps are deployed? Are the dimensions of the flaps (both krueger and extender type) such that the inboard portion of the wing will still stall before the outboard section of the wing?