The unofficial mod to RIO S2 where the music is replaced with EZ2AC, the pictures are supplied yourself, and there are probably less bugs because I ripped out all the RIO centric features.
Also the lifebar is changed.
Works on 5.0.12+ only. Auto Velocity will not work if you do not compile the latest 5.1-new branch of StepMania or the RIO fork.
Configure the groups for Easy and Special mode in 01 SYSTEM_PARAMETERS.lua.
Supports Dance and Pump mode, although the graphics will still be for pump. (May support other modes too, but you'll probably get some bugs)
Check the operator menu. Edit 01 SYSTEM_PARAMETERS.lua.
Check Song Structure Documentation.txt.