Combine Roles/Worksets

Question

We are trying to limit the number of tabs that show up on the TLN to avoid scrolling.  To do this we would like to combine a few of the Out of the Box roles/worksets (and a few custom).  For instance I have a Workset called "My Work" which appears on the First Level of the TLN.  I would like the Collaboration Room to show up on the Second Level when user is on this tab.
To achieve this I tried adding the "Room" workset to the "My Work" workset   So now under Collaboration Room Role I see My Work->Collaboration Room->Rooms.
However the Collaboration Room still shows up on the first level of the TLN.  The "My Work" shows up on the second Level and "Rooms" shows up in the DTN.  Not really what I was looking to do at all.  So I was looking for helpful information (best practices, tips, ideas) on accomplishing this.
FYI...  All Roles see the My Work workset (which contains three other worksets).  When user clicks the My Work tab they see the three other items on the second level TLN.  I am just trying to add the Collaboration Room to the second level of this existing workset for users that are also assigned to the Collaboration Room role.

Answer 1

I am looking to implement some custom admin roles so a Portal Administrator with System and Content Admin privledges would see one tab instead of two.  It would look like this:
Portal Administration - First Level
     --Content Administration - Second Level
     --System Administration - Second Level
The role looked like this:
PortalAdminRole
   --Portal Admin Workset
Content Admin Role
System Admin Role
I created the Portal Admin role and Delta Linked the Content Admin and System Admin roles.  I then assigned a user to the Portal Admin role - the Navigation was exactly what I wanted but I got all kinds of Permission errors when trying to navigation though Content Admin and System admin options (i.e., I couldn't see the Portal Content Browser).
So then I tried a different way with the role looking like this:
PortalAdminRole
    --PortalAdminWorkset
ContentAdminWorkset (mergeID matches Content Admin workset for Content Admin Role)
This option shows both Portal Admin and Content Admin worksets on Top Level and on Second Level of the Portal Admin workset I see another ContentAdminWorkset but it has nothing under it.
I could get the PortalAdminWorkset to merge with the ContentAdmin workset for Content Admin Role but this put the ContentAdmin worksets at Second Level instead of third and made my second level TLN have too many Tabs.
Hope this helps you understand what I am trying to achieve.