To get activeSky to work I had to download FSUIPC. There is other EXE in the folder with the FSUIPC.dll. Do they need to be run as well with FS2004?

Hi and Welcome to Active Sky!No, those are cool little utilities that come with FSUIPC. I use TrafficLook all the time to keep track of AI planes around me as I fly.Hope this helps,JimActiveSky Support