Starcraft – How to unlock BroodWar units in original StarCraft campaign

Here are the official images from battle.net: http://classic.battle.net/scc/lp/sc.shtml

This includes all maps on the original game disc, and from Brood War. They are sorted by the number of players recommended for the map (click on the links at the top to see the maps).

Queens are mainly casters with 4 main skills:

• It has the built in parasite spell that enables you to see the same things the host with the parasite can. (This can be removed only by the medic's restoration)
• It can Ensnare a group of units slowing them. This can be used to either prevent them from escaping or slowing their advance.
• Spawn Broodlings can also be researched to turn any ground unit into two broodlings, instantly killing the unit in the process. I don't know what mission your playing, but if that's the first mission in brood war, then you're supposed to use spawn broodlings on the ultralisks your about to come across, effectively rendering them useless. Alternately you can ensnare them and have your hunter killers have a go at them.
• Last but not least, they can infest a terran command center which turns said command center into a terrorist-training academy for suicidal infested terrans.