I have the digitech RP50 and i was just wondering how to create different distortions for different bands like rage against the machine and smashing pumpkins. I would also like to know how to do the megadeth distortion thank for any help.
"do the megadeth distortion!" lol

Anyways, if you fool around with the amp models you should be able to find decent distortions for each, check the settings thread too. I dunno if the pedal has enough gain for megadeth though.
I will show you something different from either
Your shadow in the morning striding behind you
Or your shadow at evening rising to meet you
I will show you fear in a handful of dust
Go to the Settings Thread and you should be able to find it. Also, dont expect miracles with the RP50