Gameboy Advance SP - Screw Sizes

Hello.

I am trying to build a Gameboy Advance SP.

I do not want to use the triwing screws that come with it because they are very shallow and round off the end of my screwdriver. I would like to install all Philip's or Cross head screws of the same size into the system. Thread pattern is not important since I'm using a brand new shell housing

I can measure the size of the screws, but I'm unfamiliar with screw size categories and the various head types, etc. If anyone is aware of where I can get this information or can provide any help at all, I would greatly appreciate it!

Thank you.