These threads need to be unified. There are several that talk about the same thing. The following is what I did for a successful install(as far as I can tell).
I downloaded an earlier snapshot. After reading a post about how the snapshots were made I decided to use one that was created before end of life. The snapshot I installed was 23324. I would hazard a guess, unless you like frustration, steer away from snapshots that are less than 3.8GB. Less than that then there are a lot of files that will need to be installed from the repositories that may not be there. Using an earlier snapshot will also ensure the latest nvidia driver is installed.
Next, after reading another post about finding alternate repositories, I expanded on my sources.list file.
deb file:/usr/pluto/deb-cache/ ./
deb
http://old-releases.ubuntu.com/ubuntu/ intrepid main restricted universe multiverse
deb-src
http://old-releases.ubuntu.com/ubuntu/ intrepid main restricted universe multiverse
deb
http://old-releases.ubuntu.com/ubuntu/ intrepid-updates main restricted universe multiverse
deb-src
http://old-releases.ubuntu.com/ubuntu/ intrepid-updates main restricted universe multiverse
deb
http://deb.linuxmce.org/ubuntu/ intrepid beta2
deb
http://debian.slimdevices.com/ stable main
deb
http://packages.medibuntu.org/ intrepid free non-free
deb
http://deb.linuxmce.org/ubuntu/ 20dev_ubuntu main
deb
http://fastspeedtest.net/mirrors/ubuntu/ intrepid main restricted universe multiverse
deb
http://fastspeedtest.net/mirrors/ubuntu/ intrepid-updates main restricted universe multiverse
deb
http://fastspeedtest.net/mirrors/ubuntu/ intrepid-security main restricted universe multiverse
deb
http://ubuntu.k-net.ru/ubuntu/ intrepid-backports main restricted universe multiverse
deb
http://ubuntu.k-net.ru/ubuntu/ intrepid main restricted universe multiverse
deb
http://ubuntu.k-net.ru/ubuntu/ intrepid-updates main restricted universe multiverse
deb
http://ubuntu.k-net.ru/ubuntu/ intrepid-security main restricted universe multiverse
This may be overkill. I know that an apt-get update took a lot longer and a dist-upgrade sucked in a lot more files but when I installed lmce I did not see any errors.
I did not use the script on the desktop to start lmce installation. Instead I opted to sudio su in a terminal and go to the /root/new-installer directory and run the individual script files. pre-install-from-repo.sh, mce-install.sh, and post-install.sh in that order. I would be curious to see if the script on the desktop would work properly now since more files are being found for the installation.
Once this completed I rebooted then configured the avwizrd and then the setup wizard. Once completed mythtv seemed to be installed properly. The only other thing I noticed that was not right was my pvr150 was not detected and waiting for me to configure in the setup wizard. I was able to configure it in mythsetup from the computing link. The pvr150 worked. I installed and tested successfully an hvr1950 usb tuner/encoder.
I hope the above helps. Please read through carefully. In proof reading I found several typos and I probably missed some.