Happy and blessed 2010 for everyone!
Hi readers, I ask apologies for my absence.
My computer was working in my MSc's project and I couldn't make new posts here.
I received some comments, like this and this.
I'll answer your questions soon, when I come back from a travel in Jan, 25.
However, I say I haven't found anything about the vectors' colors.
If anyone knows how to control the colors of the arrows, in the champ(.) function, I ask you comment here.