Another update: PS3Key Firmware 4.5 released:
A new firmware is now available for download from the Members Area. On popular requests we have added the "3.55 spoof", which makes the System Menu appear as v3.55.
As always, if anyone has it feel free to attach it here and I will +Rep ya!
PS3Key Firmware 4.5 released.
Much appreciated, and +Rep coolquo.