Terry,
Well you have plenty to acompany the RI cert.
Most of the time I have seen a need for this is when one deals with alot of RT and it might be neccessary to have someone that could double check bad shots to verify or negate the shot and have some sort of leg to stand on besides the trusty old "I have been looking at film for 25 years" and that is not to say that with the cert one is any better or worse than the one who has looked at film for 25 years, but it is a certification that one has aquired through proven means of some sort, and documented.
jrw159
BTW I am looking at getting this cert as well, but I do not think that it will get me a job, but it may be benificial at some jobs. JMHO :-)