The same version of Tablix must be installed on all machines in the cluster. The tablix2_kernel executable must be located somewhere where the pvmd daemon will find it. This in most cases means that it must be in the default PATH for the user under which pvmd is running and / or the ep option in the PVM's hostfile must be set correctly. See PVM3 documentation for more details.
The most straight forward way to install Tablix on a cluster is to repeat the installation steps described above on every machine. If all machines are identical, you can simplify this task by using a utility like clusterssh.
A less boring way is to set up network booting for machines in the cluster (using a setup like the Linux terminal server project). You can also just use NFS exported directories to store the Tablix installation in. Install PVM, libxml2 and Tablix all in a NFS exported directory on a master computer. Then mount this directory on every computer in the cluster.
Another way to do this is with bootable CDs. You can use Tablix on Morphix, a modified version of Morphix that has Tablix already installed, together with automatic cluster configuration tool. Any other bootable CD that supports PVM3 clusters can also be used.
If you want to make your own bootable CD, you can find step by step instructions in Tablix on Morphix HOW-TO.