Mathieulh is one of the pillars of the big foundations that is our PSP scene. His journey in the PSP scene spotlight started with his now-defunct team, SonyXTeam. He then went on to work with other scene greats like Dark AleX and the N00bz team, giving us great things in the form of downgraders, custom firmwares and many other things that you and I might not know about.

http://forums.exophase.com/showthread.php?t=2736