Hi Rio...thanks for your input. As far as I could tell the install went perfectly, whether the downloaded file itself was faulty I do not know.
I decided on a re-install...following the usual steps...clean 1.6 install, copy the bi folder and rename the copy to rio and then installed the modswitcher file installer that I downloaded from filefront. It all installed fine but now as I go to run it all it does is go straight to vanilla BI.
I checked the target link in my short cut and it had the -show_err -mod:rio command. The whole thing read like this.. "C:\Program Files\Activision\Rome - Total War\RomeTW-BI.exe" -show_err -mod:rio. which is how its installed on my computer, the RTW version I have is Gold
Everything else looks fine. For the life of me I cant recall how I got it to work last time. It's a straight forward install just by reading the instructions, I am sure you've answered this very question a zillion times already but I am a little miffed. I've looked at the instruction page for the installer with regards to getting the launcher right and all that. If there is anything else you need to know then I'll provide it.
Cheers!