Eastern Airlines Paint kit for PMDG 737-800 by Pat Smith

Hi all! Down loaded and installed the Eastern Airlines paint kit for the PMDG 737-800 by Pat Smith, having issues,like on decent the sim stutters badly(now with all the PMDG 737), error messages about something not loading on night flights. So uninstalled it but the problem continues with the rest of my PMDG 737 all versions,any ideas what it could have changed and how I can fix it, without doing a complete uninstall and reinstall of FS9. This will teach me NEVER EVER download anything your not sure of, now I have hours of work ahead of me for a paint kit!!!!!!! Thanks Mr. Smith