Having installed RTF::Parser on my linux laptop just now, and seeing the README page for that module, it doesn't look like it's in a usable state -- e.g. there doesn't appear to be any documentation for how to use it. (And there wasn't any explicit mention of how old it is -- but the downloaded files under .cpan/build date from July 1999.) This looks like a dead-end, orphaned module. (Should CPAN have something like a garbage-collection process to clear away stuff like this?)

On the other hand, RTF::Tokenizer seems to be quite current, and is documented. You didn't mention what you need to do, but maybe this module will be able to help you out.