I want to mod my Xbox and cutsomize the case and everything. Should I get the modchips and all that other stuff installed first and then paint it? or do it it the other way around?

Whatever floats your boat.

well, it depends on your priorities, you can paint the case or chip your box whichever one you want first, just make sure that if you cut the case in any way (dvd window, fan mod, ect) just make sure you cut it first before painting it