This tells how to get medel of honor to work on 3.41: http://www.elotrolado.net/hilo_medal-of-honor-en-3-41-funciona_1504853
Medal Of Honor at 3.41 [WORKING!]
Well, that I have run the Medal of Honor in 3.41 As to operation. Edit PARAM.SFO of the game so that requested the update 3.41
Change the eboot of the game, the 2010 UFC. OM install 2.1 and start the patch to install game data on the external. (New Function button is activated to select) Install the update that calls for 1.01 and installed the game data. With the V4 hermes.