Nick Weaver explains the VCE model: http://nickapedia.com/2011/01/22/the-vce-model-yes-it-is-different/ I like the of VCE. If I was building out a new data center you can bet one of my first calls would be about Vblocks.
Bruno van de Werve (CCIE R&S program manager) posts a video at https://learningnetwork.cisco.com/thread/22306 Worth watching if you are worried about what you might see on the lab. If you are worried stop it. Does not matter what terminal program, what diagram or what size monitor you have if you know what you are dong. Hope this video puts you at ease a little bit more.
That is all I have worth posting. Been slacking too much on the blog so baby stepping back into it.