Signature template in Outlook 2007-2010

Hallo,

In Outlook 2003 you can simply use a network located (UNC path) signature template, very handy to force department to have uniform signature.
We are planning to upgrade Office 2003 to Office 2007 or 2010. I could not find the same functionality in both Outlooks. Does it mean that Signature templates are not supported anymore? Any handy tip is welcome.

Thanks
Shashi