I get bored of people who complain incessantly about not being able to overhaul their games without putting the proper effort in.
As far as mods go for III, IV and V, remember that it is not usually the game's fault for breaking when you pile on mod after mod without testing them, meeting requirements, or checking compatibility, but your fault for not thinking about what you're putting into your game. If you don't have patience, you won't only not be able to mod it in a short time as you so desire, but you'll never make it there at all. Take your time, and maybe put them in bit by bit throughout a playthrough so you have a better idea of what's going wrong when it does.