Okay I have attached two RCO files we have came across. We borrowed them from the PS3's flash file system. However, they do indeed differ from their PSP counterparts.
One of the files (dlna_plugin.rco) is uncompressed, while (friendim_plugin.rco) appears to be compressed. It appears that 0x15 is our "trigger" for this, 00 is uncompressed, while 10 is compressed.
We want to take a look inside the RCO files, for a few reasons. One, we are all curious as to their what else they may hold (on the PS3). Furthermore, it may be a good stepping point as there are additional support files used, which we will mention in a future post, that are used to enable certain XMB options in conjunction with the RCO's.