Having done some of this sort of hacking before, there is often a HUGE difference between modifying an existing option and adding something new.

It is likely that you would not need to recompile the code to make the sorts of modfiicatiosn required to change one of the existing options to the Perspective option. However adding the Perspective option, even though it would involve very few new pieces of code, would require decompiling, modification and the recompiling or some pretty smart hex editing!