PE 11 & PS Elements11 on same PC as CS6 PProCS6 & PS CS6?

I have been asked by a  company to round off  projects they have edited on a HDD useing PE11 , after doing that I must give back the HDD to the company with the finished program, they want to do the output themself of the final product, they are also giving me PE11 and PSE11 . Can I install these programs on the same machine as CS6 PPro and CS6 PS?

Thanks

Gavin