Stylesheet and JS linking error in WP multisite nested path

WPMU was merged into WordPress back in … 2010? I notice the tutorial you are looking at is from 2009. I guess some people still confusingly refer to WPMU when instead it is WordPress Multisite.

While most of the concepts are probably still valid … what are you trying to achieve? Just to have separate domains with different themes is standard functionality without much effort.

If you want to setup WordPress Multisite with a number of domains, then you could try WordPress MU Domain Mapping.

It’s this plugin that Andrea_R is referring to in her comment on the tutorial you’re trying to follow.

BTW – Andrea_R is one of the main moderators on the WordPress Multisite Forum She even has a free guide on her website about how to setup a WordPress Network.