meysam81,

While I cannot give you the exact information you need to accomplish this, the following general steps should help you to get going:

First, make all of the registration elements you want appear on the page (even if they are all disorganized). 

Take a look at \admin\Security\Register.ascx and \admin\Users\Profile.ascx -- depending on what fields you have displayed you may need to style elements that are generated from these controls

You may want to or need to modify these files by adding css classes, etc...,*** beware that if you do you will need to document these changes as they will most certainly be lost if you decide to upgrade the DotNetNuke site****

Use firebug to help discover the elements that you need to style and the styles you need to override, also to take a look at the elements and styles on the registration page you are trying to duplicate....

I know thats pretty rough/general information, but I thought it may be better than no response at all!

hope that helps,

Ian