This one is a bit dated, but while we’re on the subject of PSP theme authoring, I’ll hit ya with another… Check patpat’s CTF Tool GUI v3.1. Break down CTF themes into their respective counterparts (.rco/.prx files), put ZiNgA BuRgA’s Rcomage to work, and then piece ‘em all back together again.

CTF Tool GUI v3.1 Changes:

• Fixed a bug in extracting files from themes 5.03GEN
• Fixed more bugs related to the function of extracting files from CBC
• Improved file conversion vshmain.prx
• Improved file conversion topmenu_plugin.rco
• Improved file conversion htmlviewer_plugin.prx

Download:
CTF Tool GUI v3.1
PSP Themes

- source: l-patpat.cn

I just tried this out [converting a CTF 5.00 theme to 5.50] with patpat’s new CTF Tool GUI v2…

My PSP: an all-capable Slim running 5.50 GEN-B; I’m also using this modified version of CXMB for 5.50 GEN.

The CTF theme: Nothingface420’s Grand Theft Auto IV for 5.00.

Now patpat warns the conversion process from 5.00 to 5.50 is beta and may not always work. In my case with said theme, it worked perfectly.

Download:
CTF Tool GUI v2
CXMB for 5.50 GEN
PSP Themes

- source: pspgen