Good and bad news!
Good: With UE v12.10a and UES v5.50a the user tools 11-25 and project tools 11-25 are available in the toolbar customization dialog. So no need to edit the *.tfg file anymore manually.
Bad: I have added user tool 11, 12 and 13 to my toolbar for testing. When I move the mouse cursor over one of these 3 tools UltraEdit v12.10a immediately crashes (with the option to create a bug report dump).
I guess, this is still the tooltip bug described at
User-defined tools and toolbars in v12. So I still can't advise to use the (project) tools 11-25 from the toolbar. I have sent a bug report mail to IDM.
And the help button in the Tool Configuration dialog in UltraEdit opens still not the correct help page.
Troy from IDM could reproduce both bugs. Hopefully they are fixed in next release.
Edited on 2006-11-04:Tooltip bug which caused crashes is fixed in UE v12.20 and UES v6.10.
Help button error is fixed with help of UE v12.20a and UES v6.10a.
So with UE v12.20a or UES v6.10a it's now safe to add user/project tools 11-25 to the toolbars and run it via their icons.