I'm not sure I'm understanding your question precisely, but I'll try:
1) To make a partial-mash, you can remove 1# Extra Light DME and add in 2# Pale 2-Row malt (base grain).
2) I think you are asking "If I mash 2# base malt (as described in question 1), can I mix the 1# Caramel 60˚L with it?" - if that is what you are asking, then the answer is Yes - to do a partial mash you would mash the Caramel malt and the 2-Row malt together. And yes, 60 minute partial-mash would be sufficient.
3) I would not add extra hops. In fact, when I brewed this, I thought the hop bitterness completely messed up the beer, and made it nearly undrinkable. It took 4-5 months before this beer mellowed to a point where I thought it was passable, and 8 months before I even started to like it. Now - maybe CVCA is just not one of "my kind" of beers, to be fair!
If I were to re-brew it, personally I would use 0.5 oz Tettnang at 60 minutes, 0.5 oz Tettnang at 20 minutes, and leave out the aroma hops entirely. Also, I would use a full 8 oz lactose, and I would add it towards the end of your boil, not after fermentation. I would still add the vanilla extract at bottling or kegging time. But these changes are to my personal taste.
(I'm sure if Cheese is reading this, he's probably sharpening his axe, for me talkin' down about his baby.)