I use CRE Loaded, and I installed SEO URLs on it. Back then, your product did not go deep enough for one of my websites, so I never tried it.
In any case, I hacked the CRE Loaded SEO URLs to generate what I determined was a better-looking replacement character for special characters and spaces. I have seen dashes, pluses, and some really bad choices. But I chose the period. So here is a sample URL for my store:
http://www.example.com/Parts...Supplies/c3/p22/100.Disc.Set.for.kids/product_info.html
Notice that there are three periods in a row where there used to be an Ampersand.
So did I do a bad thing? I guess my URLs are somewhat unique, but I don't think it should be too far-out. What can we do? Will my old URLs be 404 errors?
And yes, I can't stand the stupidity of the CRE Loaded version of what they call SEO URLs. They are terrible, and any simpleton will see that they generate many different URLs for the same product for no apparent reason. It's aggravating.