Dear zaenalx
Dripping Menu is a regular Joomla! module, so after buying and downloading it, you must unzip the downloaded file.
You can install it from your Joomla! 1.5 site back end. Go to menu
Extensions -> Install/Uninstall, select the file
mod_drippingmenu_1.5.zip ( first) and click
Upload File & Install. Then you must enable the Dripping Menu from
Extensions -> Modules, select the desired menu from module parameters and also select the position and the pages, where you want the
Joomla Flash Menu to show.
Best Regards
Web-Dorado.com team
P.S.You have posted the same question twice, so I have deleted one of them.