(27/10/2010 07:46 AM)LuanTeles Wrote:  it is possible to make a custom wave for OFW 6.20

Hbl+Filer+OFW 6.20 is possible to touch the flash0 but no all files

i could access the system_bg , impose.rco and others

can i put my 5.50 system_bg.rco into OFW 6.20 without bricking?

I'm not 100% sure what you're asking, but I think the answer is "No". I don't think modding OFW is really possible.
On the other hand, I barely know what I'm doing with my PSP, so hopefully one of the more experieced users here can step in and confirm or deny what I just said.