How to get Synaptic Package Manager to learn?

[Charlie Gray <charlie@sphinxdata.co.uk>]

Hello list

64Studio 3.1 beta 32-bit is now installed and working well. However I  
have some Rosegarden data that I can't run because it was created in  
10.04.2.
64Studio/Synaptic Package Manager only recognize earlier versions (up  
to 1:1.7.3-1. I've downloaded the Gzip archive from the Debian site  
and read the advice that I should definitely use Synaptic Package  
Manager(SPM) to make any updates. So how do I tell SPM to see the new  
version and load it so I can use it? I can't work it out, it doesn't  
seem to be in the SPM manual.

All suggestions welcome

Cheers, Charlie