Hello everybody here..
I've discovered this helpful software for changing gtk themes and I'm planning to use it because it seems much more easier than manual read and go up and down on a text file like the usual gtkrc one..
So, I'm using Gnome-Color-Chooser just from this morning and I have a big doubt: when I press Apply the modifications I've done to the current theme are automatically saved on the gtkrc file of the same theme?
I'm asking this question because I haven't been able to notice any modification to the date of the file..
I'm using a slackware 12.2 with xfce 4.6.1 as DE..
Could you help me please? I've look around on the web site but I haven't found any answer to this doubt..
Thank you very much for your time and excuse me if my english is not so clear as I would!
Firstly, thanks for using GNOME Color Chooser

No, as you've already found out, the original theme isn't touched at all, instead we're overwriting its settings by using a ~/.gtkrc-2.0 file. Settings in that file have a higher priority than those from the original theme.
Further details can be found
here (section "How it works").
OK, an update..
Now it seems that I've better understood the usage of Gnome-Color-Chooser: it adds a line on ~/.gtkrc-2.0:
include ".gtkrc-2.0-gnome-color-chooser"
and then create the ~/.gtkrc-2.0-gnome-color-chooser file where the real modification are writed down.
Now the new question is: doing so, there is no risk that the new values on ~/.gtkrc-2.0-gnome-color-chooser contained values present on the old theme gtkrc file ( ~/.themes/example/gtk-2.0/gtkrc)?
Exactly, the file ~/.gtkrc-2.0-gnome-color-chooser contains _only_ your modifications and _nothing_ from the original theme.
And, much of all: if I want to publish a new theme with the resulting Gnome Color Chooser values, how can I mix the two files to obtain a new one with all the modifications?
As always, I hope that my english is not so bad as it seems to me.. and that is at least understandable..
Thank you again and see you soon!, I hope!
That's currently not really possible. I'd suggest that you share the original theme (if needed/possible) and additionally the *.gnomecc file (via file->save as).
You can always try to just append the contents of ~/.gtkrc-2.0-gnome-color-chooser to your theme's gtkrc file, but there's no guarantee that all modifications will still take effect, though (due to priority reasons). Hopefully, the GNOME 3 theming format will easily allow this.
Btw. your English is pretty understandable.. even or at least for me.. being a non-native speaker, too.

So, don't worry! ;-)
Best regards,
JackTheDipper
P.S.: Is your treeview theming in thunar now working? (wrt #gnome-art)