Merge tools ?

[pyr]

Hi,
I have a question..

- I actually use hashcat to crack hashes wiht my CPUs, gives me about ~14M hashes/sec.
- I use oclHashcat on my Cuda nvidia geforce 8400 too. About 15M hashes /sec.

Why can't we use oclHash to use CPUs too ?
I mean, if I want to optimized my crack : I would like to use CPU AND GPU, so I have to lauch separately hashcat and oclhash.
Why there is not a tool which can do a crack on both ? Or why oclHascat can not use CPU in addition to GPU ?

Thank you.