I decided to post this topic because I couldn't find the answer to my problem in any of the the forums (maybe the answer was there but my laziness didn't allow me to look through all the forums).
Anyways, so the problem I was facing was I couldn't build landmarks with jobs - thats when I realized, the landmarks had 2 versions: 1 had the LM in front of its name, and the other was just the name of the landmark. So if you want to create a landmark with jobs, make sure you use the buildingplop cheat on the version without the LM in front of it.
Enjoy!
p.s. You Can Use the BuildingPlop cheat after installing the Extra Cheats DLL found in the "New Release: SC4 Extra Cheats DLL" topic by "Buggi". instructions on how to successfully install that can be found there.
If you are a Mac user and have questions about SC4 you can contact me if you wish.