http://www.howtoforge.com/how-to-install-vmware-server-2-on-ubuntu-9.04:
sudo aptitude install linux-headers-`uname -r` build-essential xinetd
tar xvfz VMware-server-*.tar.gz
cd vmware-server-distrib
sudo ./vmware-install.pl
/etc/initramfs-tools/modules
pvscsi
sudo mkinitramfs -o /boot/initrd.img-2.6.28-18-server
gzip -dc ../initrd.img | cpio -ivd