K, I'm new this is my 1st post. Ive been wanting to mod my n64 for some time now, and today i lookin tryin to find ways to unscrew those damn screws. i found out a 4mm socket works. It need to be deep tho, or u won't be able to fit it. Also, 5/32 works too, i used that on the deep screw, as my 4mm wasnt long enough. Just find a 4mm or 5/32 screwdriver type thing, and it will work fine. Hope this helps. :D