Running 32bit software on 64bit Debian

Firstly, install the ia32-libs package

aptitude install ia32-libs ia32-libs-gtk

Install the 32bit package, forcing the architecture

dpkg -force-architecture -i amazonmp3.deb

Use ldd to see which libraries it can not find

ldd /usr/bin/amazonmp3 | grep 'not found'

Download the i386 version of those packages from packages.debian.org, and extract them into /emul/ia32-linux

dpkg -X libcairomm-1.0-1_1.6.0-1_i386.deb /emul/ia32-linux/

If you're an Ubuntu user, get the packages from packages.ubuntu.com, and extract them to /lib32 (I think?).

If you frequently want to install 32bit packages, it might be worth looking at the ia32-libs-tools package, which provide an 'apt-get and dpkg wrapper for on-the-fly ia32-libs conversion'.