So I decided for the fun of it to unlock everything in the Digital TMB. Interestingly it doesn't use the PS2 memory card stuff. It has it's own spot in the PS2 data section. It emulates the PS2 memory slots into that section. Thought it was pretty damn interesting to say the least.
If they haven't patched the MP by the time I finish the SP I was thinking about going back and trying TMB. The last TM I played before TM2012 was TM2.