I have matching xdf and os numbers but any changes i make just end up in checksum change errors. I have searched and searched again through the forums and did everything i could find trying to get it to work correctly. My os is 12202088 and am using the same number xdf from 2 different sources but keep getting the same error. I tried using the .zip file i see but says its empty when i try to extract it. Before i give up on this and go back to my hpt i really would like to give this program to work. I see LRT helping people but his comments are always edited out so i have no idea what the fix is for this. Im really lost here.