I think what happens is that Minitweaker using the txt files just works on locations starting from the beginning of the stock SH3 file, but when the file has been altered by S3D that has Skwas copyright version at the beginning of the file minitweaker is now out of whak, the beginning bytes are now longer and the addresses are no longer the same!

Gee there must have been an easier way to explain that but then it wouldn't be so much fun!

If Skwas placed his copyright & version data at the EOF then minitweaker would still work & doing a compare the difference would only show at the end of the file, all fixed.