How do I redirect certain country visitors?

I have a niche autotoblog that drives me about 100 italian visitors daily. My conversion rate for the acai berry trial program i promote is 1:200. I am not good with that.

What I need to do is redirect all my italian visitors to a nice landing page I created and keep all other visitors and spiders on my autoblog.

Anyone can help me with some script or php code? I am not very familliar with redirects.

Use the free (or paid) MaxMind database to lookup where traffic is coming from:
http://www.maxmind.com/app/ip-location

Then forward based on that.