Sorry if this has been asked before but now that I've got my Sanyo Z4 projector, I am seriously considering getting it ISF calibrated, but I want to know in advance exactly what I'm getting by doing that. Does the ISF tech just calibrate simple settings like color, shaprness, tint, etc with DVE or does it require him to go into the service menu and adjust/fine tune certain settings? After an ISF calibration, I will not need to go in and adjust anything like color or tint myself, will I? Also, how much does it cost? And finally (and most importantly), I guess I should say that right now I'm using a really cheap projection screen that I bought on Ebay. It isn't very good and actually cost less than $50. I'm only using it for the meantime. Should an ISF calibration be performed on the screen that you intend to keep for the rest of your life, or does it not matter at all? In the future, I'd love to afford a really nice Carada gray-screen and right now, I'm using a matte-white screen. If and when I get the new screen (way in the future) will I need to have another ISF calibration or will the first calibration still be good for whatever screen I decide to use? Also, does calibration differ/change with each lamp change? Right now, I have 60 hours on the lamp, but when it goes out and I have to put a new one in, will I have to get another ISF calibration? Thanks in advance.