Cannot find where to create "Customization Specifications" in VM View

So I'm trying to create a "Customization Specification". I found several articles which point to this: http://screencast.com/t/jMeP2Q4nA2c

(full article: http://www.dabcc.com/article.aspx?id=10292)

But, I simply don't have that when connecting to vCenter. That option is just missing for me: http://screencast.com/t/MyxVYZpkm

Where is it in VMware Horizon View now?

Thanks.