Yesterday was a big day for the System Center community with the release of System Center 2012 Release Candidate. Yersterday the Release Candidate 2 of the Package Conversion Manager for Configuration Manager 2012 RC2 was also released. The Package Conversion Toolkit will help you with the conversion of your classic software packages that you migrate from Configuration Manager 2007 to the new Application Model.
You will find the download at the Connect site.