Need help with drop shadow

Hi all,

In my quest to improve xubuntu's interface, I foresee a drop shadow
behind the user-name box, in the gdm artwork.
Like the one in the graphics below,

http://img351.imageshack.us/img351/4739/greeter2withshadow9hn.png

I think this little detail would make the greeter look classier
improving xubuntu look and feel significantly. If you think so too, I
would need someone who is familiar with hacking the xml code;
xubuntu.xml controls the layout of the artwork.
This is the plan: I make a drop shadow graphic and I would need
someone who could incorporate the appropriate piece of code into the
xubuntu.xml file that would place the drop shadow underneath the
user-name box, like in the picture. Unfortunately, I dont feel
competent to undertake this heck that's why asking if anyone could do
it.

J. Mak
--
http://jozmak.googlepages.com/