The CDFreaks.com servers are in the process of being upgraded. That's probably the reason for the dead links. Anyway, here you go.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Ahead\Nero Toolkit\CD Speed]
Copy - Paste this to a text file and save it as EnableSolidBurn.reg. Just double click on it. Alternatively, if you know how, you can make the changes directly in the registry.