LISP routine to overwrite layer descriptions...

I've done several searches for a commands and/or LISP routine to overwrite an existing layer description with the same layer and description found in another file.

My process:

I have several files containing standard layers that are being updated as information is processed (Casework, Equipment, Furniture, etc.). I insert these files, when updated, into several main files (Level 1, 2, 3, etc.) to add, delete or replace layers. The use of the layers is to control my blocks and their visibility through the layer manager; hide all Casework or hide all base cabinets that are 30" tall, etc. The layer description is important because it gives the user an understanding of what the layer is specifically used for; layer 'CW-30-BC B3' has a layer description of 'Casework: 30" - Base Cabinet - (11" & 30")'.

Should this layer description need to be updated from 'Casework: 30" - Base Cabinet - (11" & 30")' to 'Casework: 30" - Base Cabinet - (12" & 28")' I would like to insert the file containing the correct layer descriptions and overwrite the current layer descriptions. The current 'insert' function only overwrites the layer name, however, the layer description remains unchanged.

Note: Using the Design Center to add or overwrite layers, using Layer Translator (laytrans), or using Layer Standards (.dws) have only edited the layer name, and layer properties, these commands have not edited the layer description.

Anything you can offer to get me started is greatly appreciated.

To save others from making duplicate responses:

http://forums.augi.com/showthread.php?156837-LISP-routine-to-overwrite-layer-descriptions

http://www.theswamp.org/index.php?topic=47444.msg524528#msg524528