If all else fails, you may want to have a local foundation repair outfit take a look at what you have, and give you an estimate (usually free) of what they think is needed to correct the situation. With sticking windows and doors, I'd definitely look at foundation settlement of some kind. Doors and windows "stick" for a reason.
PM me if you want to pick my alleged brain (I'm a semi-retired civil engineer and former home inspector, and have performed more than 3500 inspections of all types of structures in the last 44 years).
Last edited by BridgeMan; 08-12-2011 at 12:06 AM.