1. Put any C/Fortran code in src/ 2. If you have compiled code, add a .First.lib() function in R/ to load the shared library 3. Edit the help file skeletons in man/. 4. Run R CMD build to create INDEX and data/00Index 5. (Optionally) edit INDEX and data/O0Index 6. Run R CMD check to check the package 7. Run R CMD build to make the package file Read "Writing R Extensions" for more information.