Mark,

This may be hideous, ignore it if so

Would it be possible to RW/RO on PUT if the player is currently RO but to have no unusual affect if it is already RW.

This way you could do the good old SITE RW at the beginning of a session to upload a bunch of files and not have the overhead of RW/RO between each file but if you were lazy you could swap a file or two over without having to RW the player.

-Geoff