Hardware upgrade problem

Hi,

I'm in the process of upgrading our old NetBackup Enterprise environment from 6.5.6 to 7.5.0.4.
Because our old server is an x86 one, I did set up a new server on x86_64 hardware with SLES 11 SP2 installed.

The hardware upgrade guide says, I should perform a full catalog backup on the old server, and import it into the same NetBackup version on the new server.
Unfortunately I can't install 6.5.6 on the new SLES 11 SP2 machine, because it uses a 3.x kernel which isn't supported by NBU 6.5.6.

Is there a standard procedure to deal with this problem?
Of course I don't want to loose my historical backups or my configured policies.

Thanks,
Matt