Thanks Asif & Ash 735, I don't which one of your ideas to try first. But I think I'll try Ash's Idea first since it only requires me replacing the files and in reverse if that doesn't work.
I managed to figure out the "blisten police car and it replaces the the LosSantos police car" issue. I either missed it in the list the last time or it wasn't there at that time.
I've already beaten this game twice on my PS2 but when I came across this site & others, I was game crazy with excitement. I went out hoping to find a PC copy right away, got it for $10.00. Now I can't wait to play in a whole new light, yippy. Thought I'd share my joy I feel. Even though I've ordered GTA4 I think after a bit I'll have to get the PC ver of that as well.