the save is corrupt once you change it me and isaac already went through that. it will show up on your ps3 but once you load it it shows as corrupt.
it might be cause you had changed it to have too many credits. the limit is 20m.
My GT5 Profile My Blu-Ray Collection My PS3 Games
Thx for the rep everyone!!! PS3 Themes (Static & Dynamic)
Anyhow i looked into this all you need is 2 files out of the save (many saves out their) but you just can not do it through memory stick. What you will have to do is jailbreak it hoping you still on 3.55OFW as you can use geohotz CFW 3.55 update through mass storage or dongles. Then you have to FTP into your PS3 installing filezilla.pkg after you get into your PS3 find where tha actual save is on the hard drive and replace those 2 files or the hexed ones, load up GT5 without the internet let it work then installing the OFW 3.55 again can get that off the sony site through mass storage.
If you updated to 3.56 then no point in all this till they jailbreak 3.56 firmware.
BADMAN