I get to step 2 and "Failed to mount writable dev_flash to /dev_blind."
You tried this way SRM?
1.Install jjolano’s dev_blind and OpenPS3FTP on your hacked PS3
2.Launch dev_blind so /dev_flash is now writable under /dev_blind
3.Launch OpenPS3FTP and connect using an FTP client on your PC
4.Browse to /dev_blind/data/cert
5.Create a backup of the original “CA24.cer” file
6.Upload the new CA24.cer file from the PSN pack below
7.Set your PS3′s Primary DNS to your PC’s IP address
(where ****PSN.exe will be running)
8.Set your PS3′s Secondary DNS to your actual DNS server
or simply use OpenDNS: 208.67.222.222
9.Reboot your PS3
10.Start ****PSN.exe on your PC
11.Log into PSN!
tools are available here - hxxp://www.ps3-hacks.com/file/283
Tips -
In step 3,4,5 - you can use the Awesome file manager instead of you like.
but make sure to make a backup of CA24.cer before overwriting it.
In step 7 - just find out what is the IP for the computer that will run ****PSN.exe:
Start>Run>type in "cmd">click OK
A black window should open...
type in "ipconfig /all" > Enter
Search for the line that indicates the IP Address .......
put those 4 numbers into the primary DNS on the PS3.
In step 8 - just put in 208.67.222.222 into the secondary DNS.