Yes it's quite easy to create your own themes now using this template.
Speak for yourself Rod. I've tried six ways from Sunday and everything is either squished together or really spread out. Different areas seem to hav ethe same distortions no matter what I try. I looked at altering both gtkrc files where it says stretch and entered False instead of True, tried them one at a time, changed every text color in each then both themes, and still some text is unreadable agaist a similar colored background in some menus and in some parts of the tool dialogs.
There are a bunch of separate folders in the OSX theme that contain all the peices and parts like bars and buttons that I like or would like to recreate with different metallic finishes, but I don't have a clue what is what and all the names are really confusing to me so I just gave up. I guess I need to find a tutorial that explains how each part functions and what it is called. What the heck is a "Trough" and a "Null" anyway.
I used this image
and got this result.