Comment 19 for bug 403408

i've got this very problem as well, using 9.10
i have not much experience in (installing) linux
guess i'm unlucky

i understand all the above pretty good i guess, but how do i get a terminal / prompt after i get the error?
if i boot from the livecd all files are locked on the harddrive that contains the installation
i cannot edit any file on there

and where do i find my harddisk in a terminal ?
i'm not very familiar with the folder structure of this system