Additional info for "Split games" chapter.
.666xx files can be created on linux using "split" command-line tool or by using it's win32 version GNU coreutils
For example Killzone 3 has one file over 4GB located in PS3_GAME/USRDIR/data_ps3.psarc
To split it into 3GB parts you should execute...
@K3Nv2 I got some cheapies at wallys, that are pretty good, already have lost a few expensive ones (one falls out and gone, can't find) while cutting grass so bought some cheap ones, and of course never lose these cheap ones. (Cheap meaning only $35, compared to air buds which I only have 1 of 2 now)