Can DOpus 9 be installed along side DOpus 6 while I'm trialing it on XP Pro? Presumably if it could I'd have to make a DOpus 9 folder to stop confusion, but, what about Start Menu entry? Would DOpus 9 create a Start Menu entry identical to DOpus 6 which just states ...\Programs\GPSoftware\Directory Opus\Directory Opus.lnk or will it indicate DOpus 9? Any other considerations?
The two versions will not co-exist on the same machine, so you should backup your Opus 6 config before installing Opus 9 in case you decide to go back to Opus 6.
In particular, Opus 9 will detect your old config in the registry and convert it to XML files, erasing the registry configuration, which Opus 6 obviously won't lke.
When you install Opus 9 it should offer to create a backup of your Opus 6 configuration. (I've only tested this when installing over Opus 8, but I believe it's the same when you install over Opus 6.)