Create New Group Button - Custom Entity

I am trying to add a Create New Group Button to a custom entity Find Screen.  Is this possible?  I added the following script to the EntityFind.asp page.

searchContainer.AddButton(CRM.Button("Create New Group","save.gif", CRM.Url(597)));

The Create New Group Screen comes up.  However, if I hit Save, nothing appears to happen.  Also, if I don't enter a name and hit "Save", I get a message that the name is missing.

This is my URL when I am on the page...

http://mycomputer/CRM/eware.dll/Do?SID=146227766039936&Act=597&Mode=1&CLk=T&Key0=58#

I noticed that each of the primary entities that have the Create New Group Button on their find screen appear to have their own SearchKey.

CompanySearchKey = 19.

This is the URL if you hit the Create New Group button on the company find screen.

http://mycomputer/CRM/eware.dll/Do?SID=146227766039936&Act=597&Mode=1&CLk=T&Key0=19

Key 58 is the key for a custom entity and does not represent a SearchKey.

Is it possible to enter a translation in order to get this to work.  Or am I attempting something that is not possible?

If I am not able to do this with the action code, is there another way to add a Create New Group button to a custom entity find screen?

Any assistance would be greatly appreciated.