RuYi wrote:
Oi that's indeed difficult. You could try putting your char on the background and put the character you want to view close to the 'camera', so your own character won't be too visible.

Sitting behind a tree works too for me.
Too much work.
http://www.mediafire.com/?bzurmzjlthd
There's a nulled mesh I made a while back. You can replace any mesh with it to make it completely disappear. I'm not going to outline it in detail, but the easiest way to make just your character disappear is to use this mesh on a thief suit, then fiddle around with the BSR until you turn off rendering for your head.
Here's the result:
