1) There are a number of patches that you need in addition to the
player, including the Advanced Graphics TDK 2.0, a couple of patches for
the Advanced Graphics TDK (Patch IDs 331 & 841) and the
Character-Set Translation and devi-hid Photon Patch (Patch ID 842).  If
you're just running the player under Photon you might not need all of
these patches though I expect you need the last two.

2) Not sure what you mean by this.

3) The player supports the ability to load extension DLLs, which you can
write.  These extensions amongst other things are able to implement what
appear to ActionScript code to be regular ActionScript classes but which
invoke functions in the extension DLLs.  As these extensions are written
in C or C++, they can do pretty much anything.