There is no relationship between Meta Refresh and PR. If you want to transfer PR from one site to another, you want to use the 302 Permanent Redirect argument in Apache. But even then, it's debatable whether your PR will transfer completely or not.
302 is a temp redirect, 301 would redirect permanantly to another domain and 'should' pass the PR. The meta refresh has nothing to do with PR, pagerank is only a factor of links. For more PR you need more links.
Ah yes. Sorry, I mixed up my numbers. 302 is temporary, 301 is permanent. Fumbly fingers The point behind the 301 is that whatever has been redirected is now considered to be that new address. So, if you redirect domain1.com to domain2.com, domain2 is now the recognized destination for all domain1.com links which have been specified within the redirect argument. In theory, this transfers PR from domain1 to domain2. As to how well this takes place, I'm not so sure. Crack open the PR algorithm and tell me!