Today, I need to configure coldfusion9 multi-instance in window 2008. It's my first time to do in my developer life. In this case, my  so-called senior showed me how to configure multi-instance in window 2008. I don't know how's complicated in CF7 and CF8. But in CF9, it's quite easy if you know that. Ok, let's go. First of all, you need to choose number two option (multiserver configuration) when you start installing CF9. Then, proceed as usual installation. After installing, open Coldfusion administration. Scroll down left-side bar and go to ENTERPRISE MANAGER > Instance Manager. After that, click on New Instance Button regarding following screen (screen - 1).

After that, Add New Coldfusion Server form will be came out. And fill all needed information like following screen (screen - 2). Server Name is your new instance name. Just give "Demo" as your new instance name.  Server Directory is where you want to put your application folder. I think, the rest information are just optional.

After creating new instance, open IIS and get ready to create new website (screen - 3).

After that, you need to fill all needed information for new website as following screen (screen - 4). In this screen, just give "Demo" as your new website name. For Physical Path,  choose the path where you stored your application folders. Then you need to assign Port. Default port is 80 but oddly you can't use this port because default website is already used this port number. So you need to choose another port 81 as example.

After that, go to Start Menu and find Web Server Configuration Tool. If you can't get it into Start Menu, go like following hierarchy Start Menu > All Programs > Adobe > Web Server Configuration Tool (screen - 5).

After that, you will get following screen (screen - 6). In this screen, you will get Web Server Configuration box then click Add button.

Then, you need to fill all needed information into this box (screen - 7). You don't need to change for JRun Host. JRun Server dropdown, you will see "Admin", "Cfusion" and "Demo". You need to choose "Demo" because it's either your new instance or new website. In Web Server, you don't need to choose other web servers because you will need to use IIS as our Default Web Server. In IIS Website, you will see "All" and "Demo". In this case, you need to choose "Demo" as your website. After that, click Ok button. After that, prompt will display that you need to restart your website. Don't worry click "OK" as restarting your website.

After After all, open your Internet Explorer and type "http://localhost:81" then your website will be coming up smoothly. And, open Task Manager and to go Process tab, then will see new process is running as your website. How's easy.!! Special thanks to Mr_Nil who also guide me about that.