Games Portal Games Pages SEO Friendly

I've used mod_rewrite to make the Games Portal Games Pages SEO friendly, so instead of a page URL being something like:
http://games.directorygold.com/arcade.php?mode=game&id=7548&win=self

they're
http://games.directorygold.com/play/7548/Easter_Egg_Match_2

I've looked into using mod_rewrite before, but never been able to work out properly how to do it. In fact, the last time I paid someone to do it for my Resource Repository. This time, using the alterations done to that as a reference and a number of tutorials found online, I was finally able to work it out.