Benchmark using Sample Schemas

Hello, I wonder if there is available any script or collection of scripts which can be executed against the sample schemas (HR, OE, ...) in a 10gR2 or 11g Oracle Database.

We want to use it as a benchmark in order to compare different configurations of our RAC installation. Using the sample schemas allows us to assure the same initial data by recreating them before executing the benchmark.

Thank you very much

Nicolau