1) Script Title: Animated Collapsible DIV v2.4

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...edcollapse.htm

3) Describe problem:
Okay, so I managed to get the script working, but for what I want to do, I want it so that there is a sub collapse panel within the collapsible panel. An example of what I want is below (When Collapse 2 is clicked, it shows collapse 2.5, but in a "indented" style so the 2 and 2.5 are not directly lined up)
E.g.
Collapse 1
Collapse 2
Collapse 2.5
Collapse 2.55
Collapse 3

I'm assuming that this has to be modified from the JavaScript file? As well, is it possible for someone to clean out the "group" stuff for me, since I'm not using that.
Code:
http://www.mediafire.com/file/j80oksx6sl944rb/Animated%20Collapse.zip
To download what I have so far (since I don't have hosting yet). If you need me to post anything else, just tell me. Thanks