Recapping multiple domain Issues. Here is what I have gathered.
(I have 2 domains PR0, PR6 I have to display PRO site.) They both pertain to same line of business.
My goal was to associate the old domain with the new one to build up its PR. Lets just say new company has no PR0 value the OLD6 does. Again same line of business just new domain name.

Methods where as follows

1 Parking Domains on top of each other. (Have not really figured out how this method is done) Still have Dup issues.

2 Redirect methods (Using the Permanent option for redirect.)

Can anyone here tell me if they used any of the following methods and how it worked for them?

I am hosted on a MS 2003 IIS and Flash based server.

Unless the domains are all unique (in other words unique content etc) I'd recommend parking them and 301 them to one site.

301's can be done on IIS quite easily - but you will likely need to set up a site for each domain, then redirect that site via 301 to the domain you want to use.

Don't add each domain name to the existing site, or they will all properly resolve, causing duplicate content issues. Best to create new sites for each and redirect.

And by creating new sites I don't mean you need a whole site, but IIS has to recognize it as a site. Then in the properties page you set up the redirect.

It's been a while since I set up an IIS redirect but I think I've got it right here.