Help with UV mapping in blender

[sims_reality]

I've made a pretty nice hair mesh,and I wanted to texture it nicely, however, being a comolete newbie on blender, I found the task quite challenging, and I hit some problems.

1. I marked the seams, and pressed 'U' in Edit mode, and selected 'Follow active (quads)' so I'd get a straight UV map (like the one you would get when you uv map a piece of unmodified plane in milkshape3d). But when I select it, blender gives me an error message 'Error:active faces not selected'. I honestly have no idea what this means. I selected the whole group by pressing 'a' before I started uv mapping.

2. When I somehow managed to map the thing (I don't know how I did it, I just did what I did on number 1), I realized that only the quads are mapped on the UV map. The triangles are not appearing on the map at all!

I really hope somone could help me....

[maninkka]

yes the thread is "old" but I face the same difficulties. don't know at all how to map with blender - i.e. I did manage to map an object in blender as the "blender: noob to pro" guide explains it, but it's still in question how to make it work for sims3 cc..

a hint would be nice, someone has to know how to do it, so please tell us :) thanks VERY much.