WordPress MU

I'm trying to install wordpress-mu in a IIS5.0 (and is mandatory to use www in domain name). I want to set it with subdirectories.

I try to change the index-install.php and edit the www replace lines and in nowww set "$nowww = $_POST[ 'basedomain' ];"

But after that I get a continously redirect in http://www.mydomain.tld/blogs/wp-config.hp

Any idea?

First av all you need a rewrite software to use on IIS - equivalent to mod_rewrite on Apache. It's a must!

After that it is possible to install it on IIS, even if people here don't recommend it.

WPMU is written for apache...I'd recommend you download and install apache from http://httpd.apache.org/