As for the name of the section, it doesn't really matter what it is called. Everyone, well almost everyone, knows to play BW you need the original SC. There have been a lot of posts asking things about SC since the poster didn't have BW. Also, since I know SC and BW inside and out, if you have a question regarding SC, just make a new post and I'll answer it.
But as most have said already, almost everyone who plays SC uses BW to play these days, since BW adds some bitching units like the Zerg Lurker and the Terran Medic. So I would suggest you simply hunt down a copy of BW, most gaming stores have the SC Battlechest that contains SC, BW, two strategy books, and two Tech Tree papers, all for $10-$30 depending on where you buy it. At some places you can even find BW all on its own for $4.99+tax.
As for hacks, in my opinion, anyone who uses them are jackasses and should be stabbed with a spoon a thousand times, but thats just me. But, most hacks that are made work for both SC and BW so it really doesn't matter what game you use.
There is one thing you should know... Roughly 80-90% of all custom maps created now are in .SCX format, meaning you need BW to play it because it uses a BW unit or trigger.
To sum it up, go get BroodWar, you won't regret it.
