Add Code to httpd.conf with Include?

Hello, Please i need help figuring how to edit my httpd.conf file and add a url rewrite map ( RewriteMap lc int:tolower) In The Virtual Hosts for the whole server. please if my explanation is wrong i beleive you should know what i mean to do.. i have whm root access as the server belongs to me Simply: i just need to add (RewriteMap lc int:tolower) to virtual hosts block for entire sites. please i need help.