just to let you know that we have fixed the issue that I was referring to couple days ago (SQL Server 2012 with SP2 Slipstream ISO images do not install SP2). The new ISOs have been posted on their respective release channels (MSDN...) and are now available.
The associated KB article is here.
Jean-Yves Devant Senior Program Manager/SQL Server. - Servicing PM of High Availability and Mobile Technologies. - Feature PM Replication Technologies. - Business owner/release PM of Service Packs.
Please resolve the Identity Jump which exists even in SQL Server 2012 Service Pack 2. A trace flag can be added to avoid this but this is an issue, please resolve it in the next update release!