It does as it says, I've got a ps2 3003v4 and have fitted the Neo 2.5 mod it only has 5 wires and is easyer to fit than the Neo2.2. To boot DVDR's you will need AR2v1.9 and a original disk like DOA to do a double swap. read my artical about how to boot with Neo2.5 in this forum.
Hope I've helped.



PS2 30003v4
Neo 2.5 DVD mod
AR2 v1.9
Pioneer DVD Writer
Sony 12x Writer
CDR Win v4
Primo DVD