OK, as nobody else has answered...
First off, i'm a bit confused by
I'm downloading the SRPM iso files as I type . . .
.iso files are for burning onto CD, SRPMs are source RPMs. I'd expect you to get something called
filename.src.rpm.
Assuming you have got a .src.rpm, become root, then type
rpmbuild --rebuild filename.src.rpm
this will build the package and, assuming the build worked, it will create
filename.rpm - it may be somewhere like /usr/src/packages/RPMS or in the working directory, depends what RedHat are doing these days. The build output should give you a hint as to where the rpm was created. Go there, then type
rpm -ivh filename.rpm
Which should say something like
Preparing... ######################## [100%]
1: filename ######################## [100%]
And there you go