Here is the official Murrine Engine thread.
Here is the official page: http://www.cimitan.com/murrine
Feel free to ask anything.
I'd like to offer my support to the ubuntu community.
From Feisty murrine is in the official repositories!
Install through synaptic or with sudo apt-get install gtk2-engines-murrine
Few Steps more
Search for themes on the official Murrine website!
Cimi - Andrea Cimitan