One of the problems is that player records -data and ratings- have different length and format between PS2 and PSP versions. Then, it is not straightforward to convert from PS2 to PSP (PSP to PS2).
Below, you see 2 players comparison, taking the same player in each case.
The PSP section, in a), shows all the bytes relevant for Moises Alou (Jeff Bagwell). In the PS2 section, these appear in c). In b), I just moved some bytes to the right from the PS2 data for a better alignment. However, it is not clear to me how to fill those empty spaces that appear.
This suggests that there is extra information or ratings in the PSP version. At least, the PSP player format is different from PS2. Not totally sure.
Considering all the above, if there is an editor for the PS2 version, it is not going to work with the PSP version. Perhaps the person who coded the PS2 editor could be able to modify it to make it work with PSP roster files without too much effort.
Code:
*Moises Alou player comparison
PSP
a) 12 00 12 00 66 1A 1B 2E 78 48 EC 96 98 D9 4A 3B 41 02 00 40 27 60 48 40 BC 21 74 00 00 00 00 00 D4 6D 06 09 E0 6D 06 09 4D 6F 69 73 65 73 00 00 00 00 00 00 41 6C 6F 75 00 00 00 00 00 00 00 00 00 00 00 00
PS2
b) 12 00 67 1A 1B 9E C4 4C 88 50 44 04 11 11 01 00 02 00 32 4F C0 10 01 F1 06 01 1D 00 00 00 00 4D 6F 69 73 65 73 00 00 00 00 00 00 41 6C 6F 75 00 00 00 00 00 00 00 00 00 00 00 00 00
c) 12 00 67 1A 1B 9E C4 4C 88 50 44 04 11 11 01 00 02 00 32 00 00 4F C0 10 01 F1 06 01 1D 00 00 4D 6F 69 73 65 73 00 00 00 00 00 00 41 6C 6F 75 00 00 00 00 00 00 00 00 00 00 00 00 00
*Jeff Bagwell player comparison
PSP
a) 2E 00 05 00 1D 1D 98 08 73 60 D0 67 B6 D7 8C 4B A9 01 00 40 14 10 D0 40 C8 20 7B 00 00 00 00 00 9C 72 06 09 A8 72 06 09 4A 65 66 66 00 00 00 00 00 00 00 00 42 61 67 77 65 6C 6C 00 00 00 00 00 00 00 00 00
PS2
b) 2E 00 1D 1D D8 5C 41 44 A0 50 44 04 11 11 01 00 01 00 32 00 00 29 20 20 03 21 03 19 1E 00 00 4A 65 66 66 00 00 00 00 00 00 00 00 42 61 67 77 65 6C 6C 00 00 00 00 00 00 00 00 00 00
c) 2E 00 1D 1D D8 5C 41 44 A0 50 44 04 11 11 01 00 01 00 32 00 00 29 20 20 03 21 03 19 1E 00 00 4A 65 66 66 00 00 00 00 00 00 00 00 42 61 67 77 65 6C 6C 00 00 00 00 00 00 00 00 00 00