:-X I haven't tried those missions, m8 (sorry), but reading your Q...
isn't it just a couple of triggers?! I mean, the "skipTime" command
Example:
Skiptime 4.5
...will skip 4.5 hours etc.
Or maybe I don't get the idea...
;D hek - it might be some "Description.ext" trick. Ya never know with them bas_guys ;D