I've solved it (with help from here and the DAZ 3D forums). Here is my entry from there, which I hope will help others experiencing the same issue:

SUCCESS!

I loaded OSX 5.6 on a secondary HD and installed C7Pro there. It opened up with fonts. I entered my name and serial number in the form to initialize the program. I closed it and checked the Preferences.txt file and it appeared similar to the versions I've seen by others, files that actually worked.

I copied the file to my primary HD, modified the FONT declaration, and restarted in Snow Leopard.

I launched C7Pro, but was disappointed to find that no fonts appeared, just the following empty form:

HOWEVER...

Having just seen that screen when I loaded C7Pro on my secondary HD, I knew what that form was asking:

Name<br></br>
Serial Number

So, even though I could not see what I was typing, and there was no moving cursor feedback to indicate that any text was being entered, I nevertheless entered my name and serial number in the appropriate boxes, and clicked the right-side button at the bottom...

VIOLA! Suddenly the fonts appeared, my program was initialized, and everything appeared in its proper place! From this experience I believe that the program only writes a proper Preferences.txt file after the the serial number is entered, whether or not the fonts are visible.

So here is a simple potential solution for those having problems with missing fonts in Snow Leopard:

1. Uninstall C7Pro from your computer along with any serial number information (I think the "Remove CarraraPro" application will do all of this, but check the libraries just in case). Mainly you want to be forced to re-enter the serial number in that initial form.

2. Reinstall C7Pro and launch the program.

3. You should get a screeen with nothing but the image above. Carefully input your name in the upper text box, and VERY CAREFULLY input your serial number in the lower text box.

4. Click the bottom-right button on the form.

If this doesn't work, then follow VFX13's advice, or something similar (like I did):

**- Erase and install install OSX 5.8 (and software update)

• Install & update Carrara 7 (Pro)
• Set font in the preference.txt file to Times
• Install OSX 6, Hit CUSTOMIZE, check Rosetta
• Carrara SHOULD work perfectly.** **
  **
  I hope this works for everyone. It's a shame it took so long to figure this out (and without any help from DAZ).

Good luck to all.