I may not have explain it well: the package in Debian is a pure 64 bits package.
I can not understand the reasons for your answer or the reason of this thread: in an Debian lenny/sid amd64 machine: "apt-get install squeak-vm" just works.
Yes but adding lenny to /etc/apt/sources.list as well as etch is a risky proposition for the health of my etch system.