I have been trying to mod most of my systems and some of my friends have older systems moded so I was wondering can you mod a nintendo 64?

Mod it to play imports yes,Like the old Sega genny trick to play mega drive games just take the top cover off.As far as other mods I dont know of any sorry.

how do you take the top. There is special scews that hold it on? :bawling:

If i remember correctly the same screws are on the Sega like a torx security screw, This tool can be found online. Its been a long time I messed with cartridge based consoles so I dont remember clearly everything.