Glad to help.
I started out with SHS4, and had a lot of fun with it.
I've been running SHS6XL since it came out. I remember a long list of things that were addressed from SHS4.
There are still some new, boxed versions of it floating around. You might want to look into that. It is rock solid under XP, and runs better on my machine than X1 does.
Don't be tempted to get X2, at least not while you are running XP. The updates won't load in XP.