Can I move /library and/applications to a hard drive thusfreeing up space on my ssd?

Question

I am trying to set up my new Mac Pro. The SSD is small (120Gb) I have plenty of hard drive space, I know how to redirect the user folder. Can I move the other lager foders?

Answer 1

RE: Redirecting Caches:
There are some tools in the Server Administration Tools (Workgroup Manager) that can accommodate automatic "Folder Redirection" of the ~/Library/Caches folder to another location at login, such as /tmp/yourname/Library/Caches/ by default.
This assumes you are running the appropriate version of WorkGroup Manager. You simply run the appropriate version of WorkGroup Manager directly on your Mac instead of on the Server:
The Managed Client.app Preference Manifest
One of the most powerful portions of the Details setup in Leopard [and later] is hidden by default. This is the preference manifest set built into the Managed Client application itself. The Managed Client application resides in /System/Library/CoreServices and contains the code used to run the entire MCX process. The compositor is also located here, along with the code to run mobile accounts, portable home directories, and much more. The MCX team built a very large preference manifest list in here that is continually being refined and revised.
The manifest is made visible by going into Details, selecting the /System/Library/ CoreServices/ManagedClient.app, and adding it to the set. The items show up as bold, gray items compared to the italicized items you already have. Some of the imports ask to replace ones you have already entered, such as Desktop. That’s okay; the values you have already entered won’t be disturbed. You will, however, be able to streamline some of your settings. Here’s a walkthrough of the manifest items offered by the Managed Client application:
Folder Redirection
This setting will help take some of the performance load off network home directory users. It is designed to force the current user’s Cache folder into /tmp on the local computer. When you must use network home accounts, this can mean a huge reduction in network traffic. More information is included in “User Accounts—MAs, PHDs, and More.”
To set this up, you open the setting to edit, select the Always domain, and add a new key. Choose Login Redirections from the pop-up menu. Now select that new subkey. Click to turn down the disclosure triangle, and add a new key to that key. This subkey will be called Redirect Action Info. When you open that key, you’ll see that the defaults are already filled in for you:
The default Login Redirections item
The other actions are Logout Redirection and Other Redirections. One key point here is that you cannot create a redirection to force the user’s home, or a subfolder, to an upstream or network location. These redirections take place before any mount points are available, so the redirection would fail.
from this white paper:
http://images.apple.com/education/docs/Apple-ClientManagementWhitePaper.pdf