This is my first develop for PSP purposes, so sugestions will be nice.
That's a Popstation GUI made in Python, using the TKinter module, it's works for Popstation Single-Disc and Multi-Disc.
Simply run PyPOPS.py and put the PSX Images, and choose the Compress Level. Then press Make EBOOT button. If you want to customize your EBOOT, put ICON0.png, PIC0.png, BOOT.png, etc... in the program's folder.
ATTENTION: You Need the Python Interpreter to run the program, you can download it here: http://www.python.org/download/