I had read through a lot of the posts but must have missed where it gave the Numinix version. Quite funny that I search on "latest install guide/instructions" in this thread, but people kept saying they used "this version of Numinix". Anyway, all good got the install instructions and found Kiddo's Fixes.

http://www.numinix.com/blog/2009/09/...n-cart-1-3-8a/

http://www.zen-cart.com/forum/showpo...&postcount=565

Wordpress just released a new version yesterday (2.9.1) so I'm going to be trying with it.

Thanks for your reply DivaVocals!