Hmm... okay. That complicates things abit. I use CS5, so our interface isn't the same.
It will be kind of hard teaching you the stuff i do cuz' of that.
Anyways, install the latest version that you have.
While you do so, i really reccomend reading Mr. Goblin's tutorial on making Wc3 skins.
I know sigmaking is very diffirent from skins, but i learned alot from that tutorial that i still use.