Well for certain advanced things I would rather do it myself in which I would charge you. To simplify everything I could help you do the basics and get started.
1.) Code your usercp.php to give a permission error to block all members from accessing it or use option in number 3.
2.) In your template editor do a Find and Replace for "member.php?$session[sessionurl]u=$newuserid"
3.) Add this to your .htaccess:
Code:
Redirect /member.php http://yoursite.com/yournewprofileareahere
Note that your number 2 and number 3 counteract each other. You can't redirect something if you remove it.