For one, download it again from that link, because sometimes it is updated along with the exe and only the most recently updated will work. 2, make sure you have 1.09.4 and 2.0.6. in different folders. 3,
http://mystic.sepwich.com/srb2wad/srb2netv25.zip
Click the above, download it, put it in your 2.0.6. folder, click on it, then you will see a list of buttons to the upper left, choose "Main Options". In the main screen choose "OpenGL Mode", and to use cineblast with OpenGL, click "Alternate EXE", And in the bar to the right of it, put in Srb2c(the ".exe" is not required), the current name of the cineblast Srb2 exe. If you also want OpenGL for 1.09.4 or any of
it's mods, just put a copy of the program in your 1.09.4 folder.
A few other features of the program is adding wads and socs very easily(just make sure the last wad/soc you add is in the srb2 folder(same place as the exe) or it will look for the exe in the same folder as the last wad/soc added, therefor won't find it -.-).
Most of the network options don't work, and the colors on the "game options" screen is outdated.