I searched for a good long time for what you are after. I wanted to delete the curtain and have a transparent slider both for a very clean look.. I ended up finding both of them for Sense 2.1 after a lot of searching. Install them in the order they are attached....
The Transparent Slider was developed by chuckz07 on xda. Head over and give him thanks if you like his work....
chuckz07 Transparent Slider Thread