Help? Yes sir, I do...
Heh, your time idea is in luck today. It's a command called "Skiptime", which I've used un-doubtfully in my map "Cessena Fun", but that's another story...errr...
Anyway, I've usually attached this command to the radio. The one where you hit, 0-0 while playing in game? Then you have your different radio options.
So, here's how to do it:
1. OPen up your Mission in the editor.
2. Click a button, on the top of the screen, that says "Trigger"
3. Double Click near your Player to place a "Trigger"
4. In the triggers, "Activation" Field (Text-Box), enter this command: "skiptime 1". This means, that it will skip 1 hour. If you wanted it to skip 30 Mins, it'd be "skiptime 0.5".
5. Click on the "Activation" drop-down menu, and select "Radio Alpha".
6. Then, in the text field, enter "Skiptime 1 Hour". You can change this field, and the skiptime command too.
THere you have it, click O.K., and preview your map. Go to the radio and hit Skiptime 1 Hour. Now, there's a problem. Double click on your trigger again, and change it from "Once" to "Repeatedly". THe two options should be on the right-hand side, near the top about mid-way.
I hope this helps, and good luck with your map!
-RunAWayScientist