Good how2 m8.
I have managed to get a theme using the xfce gtk engine working and looking ok in Ubuntu Feisty.
I have attached a couple of screenshots of the xfce-winter hack I did as a result of this guide.
There are 2 shots of nautilus-I am going with the second style which uses a darker gradient-this way it blends in with the window frame better. It looks better in firefox that way too
The panel is an image I made in GIMP (I have made hundreds of panel bars with gimp and use them by way of the panels right-click properties box).
I echo all who have asked for a clearlooks-engine guide similar to this. It would be great if there could be one for the 'pixbuff' engine too as I reckon that could be made to look pretty cool. I have been playing around with the 'Human' theme that comes as default with Ubuntu. It uses the clearlooks engine but I am slowly getting the hang of themeing it myself. I am just a bit lost around all of the 'class' variables and stuff like that. I only started playing around with these gtkrc files the other day and am surprised at how easy it is to get the hang of them.
Again, nice post crimesaucer.