Man, that's cool! The main problem for me is, I'm an idiot when it comes to computers. I just like the funny clicking noises when I type. Seriously though, when it comes to WoW coding, I'm useless.... *sigh*
It's not exactly what you're looking for, but i find Parrot (available from wowace.com) much easier to play around with, it basically has an option in the menu to input your own custom triggers. I'm not gonna plug parrot loads, as its essentially the same mod as sct - the only reason i switched was because you can enable icons, which I was really attracted to for some reason :p Then when it came to playing around with it, custom triggers were a nice bonus.
With regards to your sct problem, I cant actually help at all.
The DS/CLoS ones work on gains and gains only. They do however only seem to work on friendly targets witch is not the intention. This is despite the fact that i can see the "hostilerogue gains clos"-message in my combatlog.
None of the other ones work at all. Capitalization might be the issue, gonna give it some testing tomorrow.
The override=false thing seem to have helped a bit, at least all the resistmessages are working now.
The fade ones doesn't work at all neither does the dispel ones. I cant figure the gains out though. I run SaSCT too and sometimes i can get the "randomrogue gains Cloak of Shadows"-message from SaSCT and not from my custom event. Sometimes it works though and quite often i get it from friendly gains.