Unfortunately, you can't do that either. Projects including static libraries all need to use the same compiler.

So either build python27.dll separately and dynamically link to it (or just use the one that we build and release, and be careful not to mix up memory or file management functions as they will be incompatible), build everything with VS 9.0, or you'll need help to find a fix.

Most - possibly all - of our volunteers are not going to be willing to go deep on custom Python 2.7 build issues. You're probably going to have to find someone who can offer paid support.