Hi,
You will not be able to directly move your DB40 from DP 6.0 to DP 7.0, because of schema changes in DP 6.1 and DP 6.2.
Instead, the supported upgrade path is from DP 6.0 -> DP 6.1 or DP 6.2 -> DP 7.0.
I suggest you upgrade the PA-RISC environment to DP 7.0, then follow the DP 7.0 Installation and Licensing Guide on how to migrate from PA-RISC to IA-64 (they have detailed steps listed on pg175 onwards in that guide). Basically, the IDB (DB40) can be copied over.