As long as you don't remove the T55 Torx bolt that holds the CVVT hub to the camshaft or the sprocket where it bolts to the hub you can treat this just like a timing belt change once you get things back together.
While the head is off you want to time the crankshaft to its timing mark. In the case of most of the later models it is actually two notches on the camshaft sprocket and you center the timing mark on the oil pump between the two marks. Here is a good picture of what a properly timed crankshaft should look like.
Once you get the head back you can follow the other procedures for lining up and holding the camshafts for re-assembly. There is a wide variety of homemade tools documented in the repair database and in the you tube videos that were linked from here:viewtopic.php?f=1&t=53115
In my case I wound up buying the kit for $180.00 on eBay. They are a very nice set but that was some severe wallet pain.
Once the cam cover is back on you can re-install the timing belt, tighten the tensioner, remove the cam locking tools, and rotate the engine clockwise two revolutions. From there continue to rotate the engine another 90 degrees in the clockwise direction and then back the engine up 90 degrees, counter clockwise, until the marks are back lined up. Remove the timing belt and re-install it, you will need to rotate the exhaust sprocket somewhat to get it back on the marks. At that point your CVVT pre-load should be set.
Most of the pictures here are of the non CVVT models, you have different timing mark locations. Yours will be more like these.
After the belt is installed and tensioned I leave the cover off and check the tensioner again after the car has run for a few minutes. You will likely need to touch up the tension.