Is it possible to load themes with CXMB without using the .CTF format on 5.00 M33 ?

I like flashless customizing, but don't like being forced to use more space on my memory stick to hold more .ctf files just to change a gameboot, or the click sounds...

Would it be possible to just use CXMB to load the theme from memory stick reading .rco and .prx files ??

If not maybe hibby or someone interested would modify the CXMB src for me to do that.
I could then update XMBeditor (my PSP customizing brew) to allow easy gameboot changing, on the fly modification of .prx files (for changing font colors ect...)

Any thoughts ?