That is STILL ~10mb of source code to shift through. To put that in perspective that is the same as ~10mb of text to look at and figure out what can be kept the same and what needs to be modified for the PSP port. The size of the executable is irrelevant.
Edit: Comparing a PSP executable and a Win32 is extremely unfair considering that the PSP executable may have libraries statically linked to it for it to run. In short, you are comparing apples and oranges.
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