Redirects Based on IP Address

Implications on Google listings resulting from redirect based on ip address

[caragh]

Hi,
I was just wondering if anyone could help me out on a few questions.
If a site redirects from the homepage of a site to a specific page within that site, could this have any negative effects on the sites Google listings?

This site targets visitors from outside Ireland, but also has a partner sites that target visitors from within Ireland. In the case of visitors to their site, they want to set up a redirect for visitors from Ireland to their partner site. Where visitors to their partner site are from outside of the Ireland they want to redirect them to their site. Will this have a negative impact on their Google rankings? If the Google robot (hosted probably outside Ireland) visits the site will it automatically redirect to the other site, thus destroying the visibility for the site being redirected from.

I don't suppose that there is any way that a site can be prevented from appearing on a particular google regional engine?

Thanks for your help.