Funnily enough there is a tutorial... but it has been given the misleading name of 'MANUAL' and is installed with FPSC itself... It has lots of cool information about FPSC and how it works.... If you can't find it maybe look for a sticky which could help you!
I'll answer number one for you as I'm feeling uber generous... when you have selected a segment press the 'M' key and it will paint only walls...
I would answer number 2 but I don't fully understand what you mean by
Quote: "there is spaces on the left and right "
...
[EDIT]
I would normally just answer this question without being a jerk... BUT even looking at the 16 page printed manual you get with the disc would have answered your 1st question...
[/edit]
'Dawn of the Fallen Angel' coming soon(ish)...