Helpful Mod Rewrites and .htaccess rules

mod_rewrites

#### IMAGE PROTECTION ####

  #protect images from hotlinking
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(jpg|jpeg|png|gif|bmp|tiff|svg)$ - [NC,F,L]

  #protect images from hotlinking send new image
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(jpg|jpeg|png|gif|bmp|tiff|svg)$ http://www.domainname.com/donthotlink.png [NC,R,L]

  #protect images from hotlinking but allow blank referrers and send new image
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^$
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(jpg|jpeg|png|gif|bmp|tiff|svg)$ http://www.domainname.com/donthotlink.png [NC,R,L]


#### AUDIO PROTECTION ####

  #protect audio from hotlinking
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^$
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(mp3|oog|wav)$ - [NC,F,L]


#### VIDEO PROTECTION ####

  #protect video from hotlinking
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^$
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(mp4|mpg|avi|flv|mpeg|mov|wmv|mts)$ - [NC,F,L]


#### FONT PROTECTION ####

  #protect fonts from hotlinking
     RewriteEngine on
     RewriteCond %{HTTP_REFERER} !^$
     RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?domainname.com [NC]
     RewriteRule \.(eot|woff|otf|ttf|ttc|svg)$ - [NC,F,L]


#### FONT ALLOW CROSS DOMAIN ####

  #Allow Cross Domain Fonts
    <FilesMatch "\.(ttf|ttc|otf|eot|woff|svg)$">
      <IfModule mod_headers.c>
        Header set Access-Control-Allow-Origin "*"
      </IfModule>
    </FilesMatch>


#### ERROR DOCUMENTS ####

  #Set Custom Error Document Locations
     ErrorDocument 401 /error/401.html
     ErrorDocument 403 /error/403.html
     ErrorDocument 404 /error/404.html
     ErrorDocument 500 /error/500.html
     ErrorDocument 501 /error/501.html


#### CUSTOM REWRITES ####

  #rewrite from a subdirectory back to root, helpful for moving magento or wordpress out of subdirectories.
     RewriteRule ^anydirectory/(.*)$ $1
  
  #rewrite from an old domain to a new domain keeping the page or arguments
     RewriteCond %{HTTP_HOST} ^old.domain1.com$ [OR]
     RewriteCond %{HTTP_HOST} ^olddomain2.com$ [NC]
     RewriteRule ^(.*)$ http://newdomain.com/$1 [R=301,L]

  #rewrite from www to www-less keeping the page or arguments
     RewriteCond %{HTTP_HOST} ^www.domain.com$ [NC]
     RewriteRule ^(.*)$ http://domain.com/$1 [R=301,L]

  #rewrite from www-less to www keeping the page or arguments
     RewriteCond %{HTTP_HOST} ^domain.com$ [NC]
     RewriteRule ^(.*)$ http://www.domain.com/$1 [R=301,L]


#### MAINTENANCE-PAGE REDIRECT ####
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteCond %{REMOTE_ADDR} !^123\.456\.789\.000
  RewriteCond %{REQUEST_URI} !/maintenance.html$ [NC]
  RewriteCond %{REQUEST_URI} !\.(jpe?g?|png|gif) [NC]
  RewriteRule .* /maintenance.html [R=302,L]
</IfModule>

how to add this....