ATTENTION : ubuntu 9.04 needs the vmware 6.0.
If you are using vmware 5.5, then there will be a lot of problems in the installing process.
1) click the vmware's menu, vm -> install the vmware tools
2) mount the iso in the ubuntu : mount -t iso9660 /dev/cdrom /mnt
3) copy the install file to /tmp: cp /mnt/vmware-linux-tools.tar.gz /tmp
4) unmount the iso file: umount /dev/cdrom
5) install vmware tools : sudo /tmp/vmware-install.pl