New to ADT 2006 is the ability to export tool palette groups to an external file, with an extension of XPG. This file can then be copied to another machine and imported there. You could also export tool palette groups you no longer need, but want to save in case you need to restore them in the future.
To export a tool palette group, right click on the spine of the Tool palettes and choose Customize... from the context menu. On the right side of the Customize dialog, in the Palette Groups list box, right click on a tool palette name and choose Export... from the context menu.
In the Export Group dialog, navigate to the folder in which you wish to store your XPG file, provide a name and select Save to create the file. The palette group you select, and any nested palette groups will be included in the exported file.
To export all of the palette groups, scroll down to the bottom of the Palette Groups list box and right click below the bottom line. Choose Export All... from the context list and save the file as noted above. All of the palette groups will be included in the exported file.
Importing palette groups is similar; right click a palette group or below the entire list and choose Import... from the context menu. Navigate to the desired XPG file and choose Open to import the palette group[s].
Note that this does not export or import the tool palettes associated with each group, so you can not share the actual palettes this way. I have found that if I import a palette group back onto the same computer where the palettes remain in the active profile, the palette groups are populated with the palettes, so it does "remember" which palettes were in each group. If you do this in a different profile, with a different tool palette workspace that does not have the same palettes, the groups will not be populated.
I do not have access to multiple computers that have ADT 2006 installed, so I do not know exactly how the groups are saving the list of palettes associated with each group, but I suspect it may be using the globally unique identifier [GUID] assigned to each palette. If the GUIDs of refreshable pallete pulled from the same, network-based catalog are the same, and those palettes are loaded on two different computers, you should be able to export the palette groups on one computer and import them on the other and have them be populated with the tool palettes. Unfortuately I can not test that suspicion to see if it holds true, or whether it is necessary to have the palettes installed before importing the palette groups.