How to downgrade Cuda from 5 to 4.2 ?

Accelerated Computing CUDA CUDA Setup and Installation
1

I installed Cuda 5 already, but I want to go back to the old version 4.2 because I could not find out the file: “/usr/local/cuda//C/common/common.mk” within the new version. So, what should I do then ?

Thanks!

2

You don’t need to any special steps, just install CUDA 4.2 package in /usr/local/cuda-4.2. CUDA 4.2 and CUDA 5.0 can be coexisted.