Excellent advice Sailor Steve, and not to be considered as harsh or as a rant at all.
I too have uninstalled, cleaned out the registry and re-installed a number of games over time.
All the issues I have had with SH3 have already been answered by a previous thread asking the same question, so no need for me to post the same problem again.
I think new SH3 players need to search these excellent forums, particularly the "stickies", before asking what has nearly always been answered before.
Can I just add to your advice that;
When installing a game that is to be modded that you create a simple installation process list, for future reference.
Mine sits in a special SH3 folder along with a copy of my JSGME exported "Activated Mods List"
That way I don't forget to install anything, or install in the wrong order.
Well I am nearly 62, so I am allowed a few senior moments