I want to take advantage of the "automatic grouping" but here is the
challange I have:


Consider a flat list of customers:

Customer Code || Customer Name
001 Name01
002 Name02
003 Name03
004 Name04
005 Name05
006 Name06


I want to achieve the following: (group them)
001 - 003
001 Name01
002 Name02
003 Name03
004 - 006
004 Name04
005 Name05
006 Name06


But when I use "automatic grouping" - I end up with:

001 Name01 - 003 Name03
001 Name01
002 Name02
003 Name03
004 Name04 - 006 Name06
004 Name04
005 Name05
006 Name06


As you can see, I don't want to have the "names" as a part of the
automatic grouping level names. Just display the codes.

Any ideas?