Transfer CAL’s from Windows 2003 to SBS 2003

We have a Windows 2003 Standard Edition server in London with around 300 CAL’s on it, however we have moved our operations to Cape Town and have setup a SBS 2003 server.

Can I transfer the CALs from the Windows 2003 server to the SBS 2003 Server in cape town and what would be the best way to achieve this?

Many thanks for any advice.