no offence ctbram, but that looks like a pretty easy model to unwrap UVs for.

as others have suggested just pick the faces for one plane, planar map them and then pull the UVs to one side before you tackle anything else. then planar map the side planes and move them to one side. if you are remapping areas you've already layed out than sure you're going to have a problem... but really...how can you not know what you've already mapped?

As for dealing with areas that you've extruded, such as the yellow square extrusion on the yellow plane, i would select the face nearest the camera, ctrl backclick to change to UVs and then use the scale tool to pull those UVs in and then use shift > to move up the hierachy to pull the next loop of UVs in and so on... but really, as Mike said, that's only if you are majorly concerned about stretching.

to constantly complain about something taking a long amount of time when you are just beginning to learn it is just unnecessary - I mean obviously it's going to take a long time because you've just started learning it, but it's not like it's always going to take 50 hours.

as for the help files, i have to agree with gster on that one, I find them pretty helpful and certainly not that bad when it comes to techno babble.