Thanks for taking the time to explain that to him Shisha, I didn't have any time at work today :-\
ezi: you can apply a SQL patch by going to the admin patch area of X-Cart, scrolling down to the SQL area. there are 2 options, 1 is to upload a file from your harddrive, the other is to paste in the SQL commands directly. you can do either. you have to upload (or paste the contents) of both:
sql/xcseo.sql
sql/xcseo_lng_US.sql
into the X-Cart patch admin.
Hopefully the following link from the X-Cart manual will explain this better.
http://x-cart.com/xcart_manual/online_4x/applying_sql_patches.htm