Isometric Cube-Game Help?

I want to do this:

<img src="http://www.brickshelf.com/gallery/Forlorn/Random/proof_of_concept.gif">

But I have no idea how to accomplish the isometric view, as there are caps but no explanation as to what the hell is going on in them. I also want to know how to make a 'level editor' so as when you left click a cube is created and snaps to the gridspace. And also how the system would recognise when a formation of cubes makes a structure, and cubes on top of cubes but that's a bit later. And also, whatabout custom pathfinding that isn't really bad like the built in rts behaviour which gets stupid with collisions?

Examine those caps very carefully.Sometimes people make these caps with no explanations on how to actually do that particular thing.It's quite frustrating when someone post's a "tutorial cap" with no readme file on how they actually achieved this.

I get this alot sometimes.When i ask for help then they send me just a cap.No explanations on how they did it or how some events and formulas work.Wish someone could write a comprehensive tutorial about the more advanced features that Construct has.

I think I read somewhere that it might be possible to use a different layer when making different heights of cubes. I also found a good pathfinding formula that places nodes in the diamond grid shape, but I didn't understand the math behind the placement of them.