At my game address this piece is 0059FED2. Row 00,00,00,40,08,44,20,05,A0.
If fourth value is 40 then change it to 41 etc. If you add too much, then piece is disappear. I found it in the following way: run Braid in 'windowed' mode. Remove save file in other folder. Run new game. Get this piece. Run Cheat Engine. Go to puzzle screen. Rotate this piece. And Checking addresses in Cheat Engine. If you observe changes in any row... this is 'This' piece row. :]