Upgrade finbasis 600 to 602 or higher

Dear ladies and gentlemen,

we have an request, that we need to implement the finbasis 602 or higher in our system.

Unfortunately we are based on finbasis 600.

Now, our question would be:  Is there a Upgrade strategy from SAP in place, that we can upgrade only the relevant Softwarecompenents

like finbasis 600 to finbasis 602 or higher / sap_appl 600 to sap_appl 602 or higher..

Or if we have todo an Upgrade to EHP2 or higher?

Thanks Kind reagrds

Stephan