PS3 Gran Turismo 5 Update 2.11 EBOOT Fix for CFW 3.55 Released

Quote (White Lord):

Extract the content to USB hard drive or device.
DO NOT RENAME THE FILE!!!

Use Multiman 04.05...above version
(update to latest version if necessary)

Open File Manager (mmOS) in Multiman Settings Menu
and browse the file.

Double click it and confirm with Yes.

Enjoy Online GT5 latest update on your PS3.