Modify Map Contents Window

I am using Robert's eLayerList Widget. It works great. But, I was wondering if it is possible to make the changes shown in the attached image:

- Move the items inside the red box (labeled 1) to "Water Process Streams" (labeled 3).

- Delete "Water Assets" (labeled 2)

I face a rather unusual situation in that I have 92 Layers spread out in 24 MXDs. In each MXD, the Layers are in Groups and Sub-Groups.

One option is to create around 92 or so MXDs, one MXD per layer. But, this would overwhelm the RAM on my server machine resources.

Here is how each MXD is "constructed"; using "Water Assets" as an example -

"Water Process Streams" is the name of the MXD.

"Water Assets" is the Layer Group in the MXD

Under "Water Assets" are the following Layer "Sub" Groups: No.1 Water, No.2 Water, No.3 Water, No.4 Water, and 6 more Layer "Sub" Groups. Each sub-group corresponds to a completely different piping system, each with their own valves and other assets completely independent of each other.

Inside each Layer "Sub" Group are the Layers associated with each as shown by example in the attached image.

My users want the ability to turn each layer on and off. But, they also want to reduce the "nesting" shown in the attached image. Having to expand/compress, check/uncheck Layer Groups - Layer Sub-Groups - Layer SubSub Groups can be a bit confusing.

Any ideas anyone has to assist me in organizing this data inside a Map Contents Window with or without the eLayerList Widget would be appreciated.

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