5.2 is a bit n the old side so it might be "fun" finding rpms on the net
have you looked in the RHN repo that the license you bought ( and kept up ) years ago
also have you looked on the red hat web site ?
you might need to enter your username and password when you bought the license
but the normal mount is NOT working ???
do other cd's mount ?
is this a cd only drive ? or a cd/dvd rw combo drive ?
".dat " files ?? might be in a MS only format