I have been using SPQR Total War for some time and I think that it ranks among the best mods. However, I have recently installed Barbarian Invasion because, although I like the original version of RTW (modded version anyway), I would like the option to play either SPQR TW or BI. Is it possible to have both SPQR and BI? If so, how do I do so?

Where do I find show_error so that I can figure out the problem?

Thanks in advance