Hey Dean, Fantastic app which is enormous appreciated by the PS3 community obviously! Unfortunately for me, the fw3.15 base pkg would not install for me last night. I kept getting an error 80029519 during the attempted install over the older MM v.1.12 on my 60gb CECHA01 PS3 with PL3 payload.
Tried reboot- same error. I then removed v.1.12 through the Xbar (later even deleted the MM game folder), but got the same error installing the v.1.16 pkg. Reinstalled v.1.12, and boots fine (haven't tried loading my backup, but think it will work)
Just thought i should let you know in case you have any ideas, or anyone else has the same issue. I'm off to google this error and see if there's anything else i can do.