download the psp sdk and toolchain, and also if you like a decent code parser.
compile the pbp, test it with pspe or better on the system itself.
it's c++
a few weeks are not enough to learn c++, it's very complex.

http://www.ps2dev.org to get started.
there are also pre-compiled binary packages available, just google.
or search their forums or ask there, they're are mainly pros.