How to switch store in magento automatically basing on the visitors IP address

I am using magento 1.5, I already created different stores in my store.

I created stores based on language.

• English
• Chinese
• German
• French
• Spanish

i want to trap the the Ip address of the visitor. If the ip is from france, the store will automatically redirect to the french URL that i have created. If other countries it will redirected to the default store view.

thank you in advance.

I show this action Altought I havent tried it by myself. Here is the link: How to switch store views automatically

Basically, what it says is to add this code in the index.php, which is in the root folder of your magento system.

Good Luck!