Quote Originally Posted by Squid
1. Clean install of rtw patched to 1.5 (Patch 1.6 if you have BI, no patching necessary if you have Gold Edition or Eras)
I don't think that is 100% true - there is an issue with the Gold Edition that some versions were 1.3 / 1.4 (and everyone assumes they are 1.5 / 1.6) trying to run a 1.6 mod on 1.4 can give the 'select and item from the list' problem so it might be a possibility here as well..

Check what version you actually have by starting the game and going into the options screen - the version number should be in the top right hand corner.