upgrade to php5 with the Zend development environment

[itaym02]

Greetings,

As far as I can see, the server (IIS) and Zend use the php interpreter that comes with the Zend environment.
So I recon that If I want to upgrade to php5 from php4, I need to do it somhow thru the Zend softwere.

Does anyone have any idea how?

Thanks