Pikealot,
We did manage to modify the Language base from Simplified Chinese to English via the SQL Database modification. But as suggested by Lance, it is not supported and not recommended by Microsoft. There is quite a few CRM system tables that you will need to modify and even though we are able to change the language base to English, most of the labels are still in the original simplified chinese when you set the language setting to English.
The best practise for the CRM setup should always be setting up the Organization in English base language follow by the language pack installed. Unfortunately, we started out with the CRM 3.0 when it is quite new back then and we make a mistake to setup the Organization in the ntive language instead of English.
The pain really kicks in when we consolidate and upgrade all our CRM organizations (which has different collation) into one box at a later stage of our deployment.......