Compatible with IIS5 & IIS6? No chance... please remove that from the documentation, it simply dis-information.
This plugin does sound really great, according to the documentation it says it's compatible with IIS5! I must say I find this completely mystifing...
All instructions are based around not only running Apache but also Linux, which excludes 95% of the entire computer using planet.
For example >chmod 755 - I can set those effective permissions under Windows, after much digging around.
Activate Memcached or APC? There are other database caching plugins that will do this, but Memcache and APC is strictly for Linux/Apache.
There is no YUM program, nor is there a PECL, nor the PHP-Devel package, there also no APXS package.
The CDN documentation is also not clear 'Replace domain in URL with', ok, replace it with what exactly? Up to the directory /wp-content ? or is it cdn1.mydomain.com, cdn2.mydomain.com etc...
I'm sure this plugin is stunning for the 5% of people who can use it (of which probably only 1% are running WordPress). Other than that it's completely inaccessible, unuseable, poorly documented, badly explained and basically just doesn't work.
It's a bit like the SATAN plugin - promising the Earth but delivering Nothing. I'd be better off with 'Barty Crumpets only slightly effective but substantially less annoying plugin'
Sorry for the whinge, just getting it off my chest. I've spent days trying to get round these problems and have come to the conclusion it would be far easier and substantially less stressful if I just shot myself in the face.