Finding yourself at part32 suggests a massive download. The naming convention RRRDDD is cryptic, which usually implies this is either a scene release, a private backup, or a specialized data dump. If you've made it this far, your commitment to the download is impressive.
If all parts are present, WinRAR or 7-Zip will handle this effortlessly. RRRDDD.part32.rar
To help me give you a better review, could you clarify: What is the full name of the program or media? Finding yourself at part32 suggests a massive download