I also complained about this issue. There isn't even a way to uninstall DimPro and Dimension once installed (either via C3 or Add/Remove Programs). So even if one can manually run the installers and pick a destination, if you happened to make the mistake of initially going through C3, you are screwed.
 
Saying they don't want noobs to get screwed isn't an excuse. This is an advanced application often running on dedicated systems with very specific drive configurations, so it should give you these options.
 
I also noticed the fact that CW is silent on this issue. There was a thread that talked about some general C3 issues, and there were multiple replies from CW, even from Noel. But as soon as this issue came up, silence...

Well I would vote then, as I stated they are going to improve it (I can't imagine what else they can do) and there is a workaround...
Cheers...

I also have an SSD dedicated for software only and I installed everything via CCC in there. Is there a (simple) way to move all the samples (Dim Pro, Rapture, Loops etc...) into another designated samples drive? While letting CCC also know where to install its updates? 
 
 

At the moment I have Dim Pro, Rapture etc installed without CCC (they show red lights right now). I don't think CCC is actually managing the installations right now so I wouldn't worry about it much (maybe Cakewalk can clarify). I just CCC as a launch pad at the moment. So you could move them yourself. There are plenty of threads here on how to move samples around etc for each soft synth (you need to update the registry) if you google them...
 
I was lucky enough that Sonar kept my X3E settings when I upgraded so I didn't have to do this. With X3E I did have to hack the registry to move these samples around as well.
 
Cheers

 
The easiest way to solve the problem is to let things install where they want to go, then symbolic link them to wherever you want.
 

Concessions for new users is good but it shouldn't be too hard to set up SONAR and your system the right way. I have wanted all the 32 bit only stuff to be clearly marked or in a separate folder cuz I don't want it. This has moved the wrong direction. I have no doubt this will be fixed and am aware there are work arounds. The newbies might have it working but there are a lot of people here who know what to do and how to do it and they are scratching their heads.