How is PR shared with Sub-Domains??

how can i do this for my site? i assume it's just a line i have to add to my .htaccess file

 

To redirect a single page, put this in the .htaccess file:

Redirect 301 /oldpage.html http://www.yoursite.com/newpage.html

Code (markup):

or

Redirect permanent /oldpage.html http://www.yoursite.com/newpage.html

Code (markup):

This will redirect ALL pages from your old site to the new site:

redirect 301 / http://www.yourdomain.com/

Code (markup):

 

I just did that a couple days ago for one of my sites and Google processed it prefectly. I saw a drop in listings because someone had linked to one of my subdomains using www.sub.domain.com . Google started using it instead of just sub.domain.com and I fell a few spots. Put up the 301 and now everything is back to normal including my number one listing

 

i couldn't get the 301 to work exactly like i wanted, but i was able to get it working with a rewriterule