opencv - reduce size for CUDA dll

I am using opencv for my simple application (so simple is one file). Some parts use CUDA, use some functions that come with opencv. It works fine. My problem now is that the dll in opencv that manages cuda is 500 Mb so it is abit hard to distribute. I need to reduce that size. There are 2 solutions, go to the dll code and delete all the stuff is not used by my app so the dll is smaller. or option 2 is to get what is used from the dll and put it outside so the dll is not required. If you know CUDA and C++ and OpenCV this project is for you. If you have more options I would like to hear them.