Boot from your original ubuntu disk, in live-cd mode. Do not click the Install icon when you get to the desktop!
Make a complete backup of your home directory to another, external, disk.
Then start solving the problem of why you cannot boot to the version that is installed on your HDD.
That way, your documents, pictures and emails will be safe.
Edit: I'm an idiot - townie already suggested this! I need coffee /Edit
Last edited by tredegar; 10-08-2007 at 10:57 AM.