Hello toxicflash, sorry for the delayed reply. What about the installation process are you having a problem with? Do you get any runtime errors when starting up the game? If so, which ones? Furthermore, which operating system are you using?
Here's a guide containing a lot of useful information in solving installation problems:
http://www.smf4free.com/forums/supermariobrosonline/index.php/topic,1244.0.htmlIf you continue to experience any problems after following the guide, please don't hesitate to ask and we will help you further. Thanks for your interest in SMBO!