mod_rewrite - page rank

Hi
I need help to understand why & how... may-be someone can help here?

I use mod_rewrite to do the following

domain -> www.domain
domain/page.php?param1=1&param2=2... -> domain/param1-1-param2-2.htm

and I also have a redirect in my index.php file at the root level
domain?xxx -> domain/Alpha/Page.php?xxx

all the links in the site are using 'domain/param1-1-param2-2.htm' url

I have a Page rank of 4 for gondwanastudio.com, but n/a or 0 for any of the internal pages. Why?

I am also concerned by the fact that 2 url go to the same home page
gondwanastudio.com/Alpha/Page.php & gondwanastudio.com/Content_1000000000_gondwana+studio.htm

Am I doing something wrong?

Can someone help?

PS: Gondwana site has been redesigned about 2 months ago and pulseafrica.com about 6 months ago.

im also interested in fixing my index page to my web site.

vbseo settings allow you to change all incoming links to /forums/index.php to /forums/ but how do we change all incoming links to /index.php to / ? on non forum pages?

i currently have a pagerank of 3 for / and pagerank of 4 for /index.php