Hi,
Unfortunately, as I know it is not possible to add a new program to Autoplay list.
The autoplay function is not a set of user defined choices, those are in the .inf and exe files of the individual plugnplay device. You could find them under registry which has a group of values created by software.
HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer \ AutoplayHandlers \ EventHandlers \ <Event Name>
Some third party program could add these entries for certain program so plugnplay device would play by these program as default, but it only applies to desktop program.
Regards,
D. Wu