Another question in regards to PS2 modchips. .

[A03]

I think you're talking about the Full NTSC Messiah..This chip is fully compatible with Ver.1-7.The reason it got held back was due to Ver.7 getting released..But now they're just lazy as hell releasing the da** chip period..
This was suppose to get release way back..
I tell you this much though on PAL machines the current Messiah works fine..But your option is Magic2..It's Good Chip..
If you Messiah and got it working on the NTSC machine there is catch which is the PS1 Game color problem..Color is little off from the typical normal screen..With Magic2 it's fixed..