Change textures on the fly (.NET)

[LizNet]

So, I have two .rpf files which contains the "same" texture file. These .rpf files are loaded as dlc and they replace in-game textures, but I have two different versions of that texture. Now user needs to manually select which texture they want to use and install a corresponding dlc, like any other texture mod. So far I know that I can just rename those .rpf files and put both of them to the dlclist but the game will load only the one which name matches the in-game texture.

 

So my question is, that is there any way to "swap" or load those textures on the fly? So that user can install both dlc's and a script file, then just press a button and the game will load the texture from another dlc and replace the original and vice versa. I've looked the functions, but can't figure out that is this even possible.