Help with trigger activation by alias

What I want to do is be able to set an alias to do this:
Command A
Activate Trigger
Event Triggerred
-Trigger command B
-Trigger deactivate

I'm not sure how, but I would appreciate any help.

Using "send to script" you could make the initial command an alias that does an 'enabletrigger'.

Then when the trigger fires it could do another "enabletrigger" (setting the enable to false).

See:

http://www.gammon.com.au/scripts/doc.php?function=EnableTrigger