this is demonstration firmware 4.80 to be able to install this i think you have to be on 4.80 retail first but i'm not sure.
THIS IS DEMO FIRMWARE!!!!
the update worked for me but install at your own risk!!!!
http://www.mediafire.com/file/8mr89px71c0o96x/PS3UPDAT.PUP
THIS IS DEMO FIRMWARE!!!!
the update worked for me but install at your own risk!!!!
http://www.mediafire.com/file/8mr89px71c0o96x/PS3UPDAT.PUP