Go to the Rebug site and download(when the links are working) the 3.55.4 PUP and install it, download the Toggle QA pkg from the same site, run it and it should triple beep and restart the console, then install the CFW you want.
3.55.4 is up again
Then grab the Rebug Toolbox from over here and install it.
Launch the toolbox then go to Utilities>Toggle QA and select Enable.
Once you are QA'd you can install straight from XMB.
sorry but the 4.21.2 and 3.55.4 links don't work, only create text in window, did I do something wrong?
use internet explorer then it works..
rebug v4.30.1 cfw link working now