Really? I've just downloaded 0.48.4...:cry:Rogerio: good for you I expect no intelligence from an unfolder - I design my models with a way of unfolding of individual parts already in my mind, so for me, it's really just an unfolder - I mark the faces that form an individual part, separate them from the rest, mark edges, unfold.
I can't help you with the texture (assuming this is about the paper export plugin for Blender 2.6x); but ask on the blender forum, the guys there are helpful.
B-Paperizer is for some old versions of Blender, if I remember correctly; you'd have to find the correct one.
And Inkscape is cool - just wait for the 0.49 version