OK So. Question for the crowd: I have an original retail copy of Sins on my shelf, as well as all the DLC that was released for original Sins throughout the ages (Entrenchment, diplomacy, etc.) purchased electronically. When Rebellion came out, as a standalone expansion that included all the previous stuff, I stopped playing original Sins and its expansions. I am now trying to get an older mod working in my Sins Rebellion but it keeps erroring out. Did some research and the model file I used to replace a given stock model (for mod testing purposes) is the culprit - it's referencing older files or some such.
My question here is if it's possible to... add all that to steam. I seem to remember that it all came from some sort of online client like gamespy. I tried adding my original stock Sins key into steam and it rejected it. Anyone have any thoughts?