Tarik,
Are you on NetWeaver 7.01 (7.0 EhP1)? If so, then sps11 is the minimum support stack for SQL 2012 support. The MSSPROCS report you're trying to run, etc, will require this before you can proceed.
You should be able to apply the most recent sps to your system, however. SAP does support new installations onto SQL 2012 as long as you immediately apply the updated sps right after the installation is complete. Why do you think SUM won't work?
Also, bear in mind that sps11 is a minimum; there's no reason not to go for the latest available sps -- you don't have to go to precisely sps11, just at least sps11.
Regards,
Matt