http://www.tesnexus.com/downloads/file.php?id=23208
look at files, scroll down to optional files, look for SR_4-1-30_SourceCode, it is a zip file.
Preprocessor directives:
Define the OBLIVION for OSR, FALLOUT for FSR, or NEW_VEGAS for NVSR. If defining OBLIVION you should also define OBLIVION_VERSION as 0x010201A0. If defining FALLOUT you should also define FALLOUT_VERSION as 0x01070030. No version number is required at compilation time for New Vegas.
Other:
The stutter remover is free. The stutter remover source code is likewise free (in any and all senses of the word) to the extent that I can make it so, though there may be bizarre legal issues surrounding it due to its relationship to several pieces of commercial IP.
Downloading it costs nothing, reading it costs little, fully understanding it costs 1d10 sanity points. This is not clean code, in any sense of the word.