Hi Pezone,
Assuming that target system on virtual Hyper-V has the same setup viz
ECC6 on MS SQL Server 2005 with Windows 2003 server 64 bit in Cluster.
I shall propose following approach
1) Install a new ECC 6 system on cluster on Hyper environment
2) Perform homogeneous system copy using backup restore method.
Hope this helps.
Regards,
Deepak Kori