Need help downgrading from REBUG 4.30.1 STANDARD EDITION to 3.55 ofw

[ratb266]

Ok, so I've tried using the 999 downgrader. When I run the downgrader via XMB I get the data corrupt error. I made sure I was on CEX but still get the data corrupt. Anyone have a link to a guide for this or can possibly assist me?

[cajohn20]

Ok, so I've tried using the 999 downgrader. When I run the downgrader via XMB I get the data corrupt error. I made sure I was on CEX but still get the data corrupt. Anyone have a link to a guide for this or can possibly assist me?

have you checked : http://rebug.me/
also thread : http://psx-scene.com/forums/content/...-updates-2867/

I haven't downgraded from Rebug myself yet but from regero sveral times. Won't assume what you on or steps you've
taken prior (what fw were you on initially before going to rebug, qa flag set, instructions you follow,etc). I can try later
and post back if you haven't been successful.

.....
REBUG 4.21.x AND HIGHER

INSTALL:
From XMB install REBUG 4.21.x AND HIGHER over any 3.55 OFW/CFW/MFW or the same or lower firmware version CFW with spkg sig check patched or any firmware version CFW with spkg sig check patched and QA enabled.

UNINSTALL:
From XMB REBUG 4.21.x AND HIGHER can be uninstalled with the same or higher firmware version OFW/CFW/MFW or with REBUG 3.55.x REX EDITION on a QA enabled PS3 or with the ’999′ DOWNGRADER if QA was NOT enabled.

REBUG 3.55.x REX EDITION

INSTALL:
From XMB install REBUG 3.55.x REX EDITION over the same or lower firmware version OFW/CFW/MFW or any firmware version CFW/MFW with spkg sig check patched and QA enabled.

UNINSTALL:
From XMB REBUG 3.55.x REX EDITION can be uninstalled with the same or higher firmware version OFW/CFW/MFW......