Redirect old page name to new page name

hello all

my current sites is : http://www.directconnectweb.com

in case all inner old page name like

http://www.directconnectweb.com/Directory/Web_Design.aspx etc..

so i want to redirect new page name like :

http://www.directconnectweb.com/directory/web-design.aspx

so p'se all seo guys help me this query related and it's can effect on seo ranking and page rank ?

give me idea for how can keep the conctant ranking result and page rank

uregnt reply ASAP

 

use 301 redirection: How to redirect a webpage.