WinRM 2.0 CTP2 was recently released and I mentioned it HERE.
I just tried a WinRM 2.0 CTP -> CTP2 upgade where I simply run the installer on a Server 2008 systems, and all went well (after a reboot).
I successfully ran a start-psjob before and after the uprade as a simple test of the PowerShell v2 CTP2 connection to WinRM 2.0 CTP2.
