It was not successful however in building, throwing the following error:
kBuild: Compiling dyngen - dyngen.c kBuild: Linking dyngen kmk: Leaving directory `/usr/local/VirtualBox-1.6.4/src/recompiler' kmk: Entering directory `/usr/local/VirtualBox-1.6.4/src/apps' kmk: pass_bldprogs: No such file or directory kmk: *** No rule to make target `pass_bldprogs'. Stop. kmk: Leaving directory `/usr/local/VirtualBox-1.6.4/src/apps' kmk: *** [pass_bldprogs_before] Error 2 kmk: Leaving directory `/usr/local/Virtu
More searching, I needed to add two more files manually. Read More Here.
A long wait, compiling for 20+ minutes, and a necessary reboot as upgraded images threw another error, I got 1.6.4 running, and able to boot Fedora Core 9 image created under 1.5.6
But the real test, and the need for this version was to install Intrepid.
More work still needed.