Can i upgrade my ibook G4's hardware so that it can be pc-based?

Answer 1

no you can not.
You can get an emulator like soft win or whatever is the current version

your hardware works togther in what we will call "mac language"
if you replace any with "pc lanuage" it will not work together,
it has to be all one or the other
the only exception is that some external devices support both, but not in the computer itself.

Answer 2

If I am understanding what you are asking, you want to be able to run a PC based operating system on your computer, windows XP. Compare your current specifications, and follow the directions in the site below.