I tried his psgroove, it's based off the default payload but he may well have made some other modifications to it. I had a couple of small issues with it and I've decided that for me the NUS payload is the best as it will maintain compatibility with retail games.
I fixed the EA Sports MMA issue by editing the PARAM.SFO with SFOEditor and changing the version the fw version to 3.4100. Game is now working as expected.

