Installing New WP over the Old, how to redirect links?

Hi,

anyways, I have a blog set up and it has some hundred backlinks, some front pages and etc, receives some traffic and now I feel that I should take it to the next level (changing to custom template and also the layout will change) meaning that I will change those links a bit.

That means people cant access my pages anymore through google, but how to avoid it and how to keep backlinks and etc still. I know that I should do 301 redirect or something, but there are virtually thousands of posts that will change, what to do?

Any ideas?

Changing the template and/or the layout don't affect your links structure, so you don't need to do anything.

No, i will change my linking structure, basically i will be changing a lot.... So links will def. change

install platinum seo plugin it does automatic redirects

http://www.webmaster-source.com/gocodes-redirection-plugin-wordpress/

I use this one.. easy to use and can track hits