Anybody know how to run E.barbarorum from the RTW launcher instead of trivial scripts

Hi,
does anybody know how to run E.barbarorum from the RTW.exe launcher instead of trivial scripts, i play EB on windows 7 64 bit and after a couple of battles the game always CTD's. A long time ago i managed to launch EB from rome.exe launcher instead of trivial scripts and it solved my CTD problems. I had to reboot my pc after a while for other unrelated reasons but i forgot the method i used. If anyone can help please. I know this works because ive done it before. Just forgot the the process.