I really don't know. The CAESAR II installation is self contained, and it includes the prerequisites. Theoretically, Windows 7 should already have everything an older version of CAESAR II (5.00, 5.10) needs. The HASP driver is the only thing I can think of that could be incompatible with a later OS, simply because this is a "system driver".

I have seen installations that took a very long time. I think this is more of a hardware issue between the DVD and the DVD-drive. Start it up and let it run overnight and see if the installation completes.