[Yum] Can Yum install multiple versions of the same RPM?

[Wayne Sweatt]

If I have 4 or 5 versions of say pgi or intel compilers that I need to
make available on a compile server, and each version installs into it's
own directory tree, such as /opt/PGI/6.7.8 & /opt/PGI/6.7.9 , etc...
then can yum do this? Will it complain and/or try to upgrade?
Would I use installonly?
How do I do this?
There would be no conflict per se, and I've been doing this with rpm, and
wish to move to yum.
Thanks