Yes, that
config revision is something i was mentioning before, is based in the
emulator revision, you need to check this table mysis made, the one most at right for ps2_netemu.sef
http://www.psdevwiki.com/ps3/Talk:PS2_Emulation#PS2_Emulator_Types_and_Revisions
In netemu you can see the revision literally by opening the decrypted file in a hexeditor, it seems mysis was looking at the different revisions for several firmwares and listed them
In the table it can be seen how many commands are supported by that revision of netemu, that value represents the biggest command ID
Compare wit the other table, the first time ps2_netemu.self was included in retail firmwares was in 3.70 and that revision of netemu is 15686 and supports up to command ID 0x41
The other bigger command IDs was added later
So basically, to choose a revision you need to check which commands are used in your config, and then reduce the revision the most posible, this way you allow your config file to work in older firmwares
The official configs for PS2 classics though doesnt seems to use the exact same values than the emulator revisions, what happened is that games was converted to "PS2 classics" at a later time, when there was a newer revision of netemu included in the firmware
Imagine they releases a new PS2 classics game today... then they are going to use a revision very high (17495 is latest) and even bigger because it looks they starts with that value and for every change while testing they increases the revision, they does this even if the game is using low commands ID
So basically, lets say they releases a PS2 classics today so they are going to provide a config that works only in latest firmwares, but maybe the config uses only command ID 0x00 so it can be lowered
Officially they doesnt cares in lowering the revision, but unnoficially i think we should lower it the most posible, because two reasons:
-it allows the config to work in older firmwares
-your config is definitive, no need to modify it, so is good to add it to databases, collections, etc...
Edit:
Ops, the 0x0D bytes you mean, sorry im a bit distracted, i was watching TV right now while writing that stuff