Carbon Copy Cloner allows you to exclude directories.
- Back up to an external drive (Not necessary but a good idea none the less).
- Use CCC to clone your existing drive to the SSD, but exclude the directories you don't want on the SSD. I just excluded the Users directory.
- Once you've cloned everything except the users directory to the SSD, clone your users directory to the HHD.
- Once your done cloning open System Preference/ Accounts. Unlock the pref pane to allow chnages and right click an admin account. Select advanced setting. There will be a dialog box providing a path to your home folder. Select browse and navigate to the user folder on the HHD.
- Log out, and then back in and you should be good to go.
I'd recommend against using this procedure. It's important to keep certain settings in your /user directory on the SSD for optimum performance (and to keep the HD from spinning up constantly and chewing up battery). the /user/lib files in particular need to be resident on the SSD.
Here's the procedure I've followed, which works well:
You should *keep* your /user account on the SSD. Certain library settings need to stay on this drive. You should move music, media, the itunes folder, photos, downloads, and e-mail to your data drive. This is a bit complex. itunes and iphoto allow you to specify the save directory (and itunes will copy your music). e-mail is the toughest. Here's the best instructions, from macperformanceguide.com
0. Quit Apple Mail, and make a backup of your mail folder.
1. Copy the Mail folder to the top level of your data drive (or elsewhere, then modify step 3 appropriately).
2. Rename the original mail folder to Mail.old as an additional backup.
3. Start a Terminal window and type:
ln -s /Volumes/Master/Mail Library/Mail
This makes a symbolic link to the folder Mail on the volume Master (type the name of your volume, and use quotes around it if the volume name contains a space character). The resulting file Library/Mail is a tiny file that says “look over there on /Volumes/Master/Mail instead”. Note: in this example, the data drive is named "Master" and the folder at the top level is named "Mail". If yours is different, adjust appropriately. This last step is essential to get mail to use an alternate drive as the storage directory. Not simple, but necessary.