Hi LouG,
Yes, on a different partition on the same computer, using a Dual-Boot
Scenario.
There are differences between the versions of Works. However, Works 9
will handle or open previously files created by older versions of Works.
But the only way to keep Works 4.5 is to create a Dual-Boot Scenario,
using two Hard Drives or by partitioning the current Hard Drive into two or
more partitions.
Another way there is, is to work with Drive / Partition Images created
by programs such as Acronis True Image 11 Home, or BootItNG or even Ghost.
But I would still recommend with using Partition Images, is to move the
Documents folder off the Operating system's partition, so you still have the
Documents Folder available regardless of the version of Works being used.