Scott,
We have been running into some trouble with this. Right now the plan is for that option to disappear in 6.0 and then once we get it working properly for it to come back in 6.0.1 or 6.1.0 (depending on how quickly we can resolve it). One issue to watch out for even when we bring this back is that the backend of CCS is 32bit so the JRE we run is also 32bit.
John