To install AdsMod in your forum follow the steps:

Files to Copy into your forum (please backup your original files and database before overwritting with new files)

root/includes/constants.php, 
root/includes/functions.php, 
root/styles/subsilver2/template/overall_header.html, root/styles/subsilver2/template/overall_footer.html, 
root/styles/subsilver2/template/viewtopic_body.html 

root/adclick.php, 
root/language/en/mods/adsMod.php, 
root/language/en/mods/info_acp_adsMod.php, 
root/adm/style/acp_adsMod.html, 
root/includes/acp/info/acp_adsMod.php, 
root/includes/acp/acp_adsMod.php 


Note: Follow the directory structure considering AdsMod as the root directory of your forum filestore. 

Finally, you can add and activate the Mod from the Administration Panel as below:
System -> Administration Control Panel -> Select module from the list at the bottom right corner -> Add Module -> Enable the module.

The Mod should show up as a new tab in the Administration Control Panel.