Gemini,
I have FSX, but I don't use it much, so a more experienced user may have a better answer....
Look in views menu. I think you will see a sub-heading for AI traffic. Click on that and you will see another sub-menu with all the AI traffic and you can select the one you want. Once one is selected I think you can cycle through each one using "S".
As for a key shortcut, another user will have to help you there....
Hope this helps...even if just a little bit...