As an alternative to installing Madagascar, you can now run a Crunchbang (Debian) virtual machine (VM) with it pre-installed. Just download, unzip, and run the file with Oracle VirtualBox (free software). Detailed instructions for running the VM for the first time or installing VirtualBox can be found in the readme.
MadagascarVM.zip (~3.0 GB)
MadagascarVM.7z (~2.1 GB, but requires 7zip to unpack)