Uninstalling Enterprise SSO (Biztalk 2006 R2)

Today in one of my development Virtual Machines I tried to uninstall Enterprise Single Sign On and obtain the following error:
"You cannot uninstall Microsoft Enterprise Single Sign-On because there are applications installed that depend on that product. Please uninstall the dependent applications before uninstalling Microsoft Enterprise Single Sign-On"
After some search around the log files I didn't manage to find out which applications depended on SSO, so I change my search to the web and found this link:
http://msdn.microsoft.com/en-us/library/ee251734%28v=bts.10%29.aspx
This link is related to the version 2004 of Biztalk, so the registry keys mentioned didn't help me.
I also found a post from a Portuguese colleague:
http://msdn.microsoft.com/en-us/library/ee251734%28v=bts.10%29.aspx
Which I tried and had no success.
Almost giving up I decide to dig a little on the registry and found this interesting location:
HKLM\SOFTWARE\MICROSOFT\ENTSSO\DependentProducts
On this location I had one key related with Microzoft Biztalk Server 2009 and thought: “oh that’s right I forgot I had Biztalk 2009 version installed on this machine in the past”. I think something on the uninstall process of this version gone wrong and let this key behind, so I decide to make a registry backup and delete this key. After this I tried to uninstall ENTSSO and managed to do it with success.
Hope this could help someone.
Best Regards.