There are cheats available all over the internet (I DONT PROMOTE CHEATING ONLY FOR THE SAKE TO HELP)
If you still have a save on your game, you can transfer it to the game file, and it should just do the rest
hope it help, oh and btw, i don't like to cheat, but, meh....
If you're that bad that you need cheats to play, just do us all a favor and quit now.
Monster hunter as a series contains few easily accessible glitches, and none of the standard "cheat codes." As the above states; If you find the game too hard to play, odds are you'll never find it truely enjoyable and would be better off handing it into Gamestop for whatever its worth.