Mutliples IP & multiples instances under Windows

[Athena]

Hello,

I'm installing OTRS on a Windows 2008 R2 server, using IIS and MySQL.

The default installation happens without problem, but I have 2 questions.

1) The OTRS site is installed under "Default Web Site" in IIS. How can I install it under a site named "OTRS" in the IIS Manager ?

2) As I have many IP and I need to install many OTRS instances (dev, test, prod), I need to create these 3 sites in IIS (each having a different IP), and install one OTRS instance in each site.
How can I do that ?

Thanks in advance for your help.