Here are the posts for using Seaside and Gemstone/S under KVM on Debian Lenny amd64: Goodbye VirtualBox, welcome KVM/virt-manager Create a Virtual Machine with Debian Etch amd64 on KVM with virt-manager Install Gemstone/S 64 on a KVM virtual machine Install Squeak/Seaside on a KVM virtual machine Development environment for Seaside Enjoy.