One way around issue #2 is to export your whole library from Sooloos to a HDD. This then tags all the files with the album info from the library.

Delete library.

Re-import the exported library from HDD.

Obviously this is a bit of a sledgehammer/nut solution but if using Sooloos library for Sonos/Squeeze is important to you then it can be done.

Small libraries won't take that long.

Rgds,
Nick