No tutorials for sprite system other then an earlier twitch video from Lee himself.
The commands are in the global.lua file in the scriptbank folder.
Moving this thread to scripts thread at OP's request.
Also in the upper right of the screen is a search button. Pressing it and typing sprite in the search field and pressing enter, will list out what we know and have talked about on sprites so far.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.