I may have mentioned it before to the original poster, but you could try Goth's All Factions mod for BI. It takes the original BI campaign and does a mini-Total Realism job on it: bigger map, more factions, better graphics, MTW style combat etc. It's very under-appreciated, IMO. You'll find it discussed a fair bit on the RTR forums, although it was finished nearly a year ago and Goth has not returned to modding since.