Installing GCC 4.5 on Fedora 16

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http://unix.stackexchange.com – The default GCC package available in the Fedora 16 repositories is gcc-4.6. I need to install gcc-4.5 on my system. I downloaded the packages from the kijo repository, but when I try to install them it shows that a newer libstdc++4.6 is installed. If I try to uninstall libstdc++4.6 it tries to uninstall the system itself! (Almost every package in the system). And it would not allow me install libstdc++4.5 along with libstdc++4.6. Is there a easy way that I can install gcc-4.5 on my system? (HowTos)