Do yourself a big favour and steer well clear of any mods by that company. The guy is bad news.
Do a bit of research and you'll soon find that is one to avoid - there are many posts in this forum if you search, e.g.
http://forum.x-cart.com/showthread.php?t=43083&highlight=XCSEO
Any option would be better than that - have a search though for DSEFU and CDSEO and you'll see the difference.