I've never played a mod before, but am (as I type) downloading Roma Surrectum. It seems okay from what I have read.
Do you need to have patches 1.3 and 1.5 installed though? I ask because I tried to download patch 1.3 and it failed, can't remember what it said though.
So, any help on anything? I am not the best whizz with computers... :S