Use Execute Command! I have not tried this but I've used it doing a chmod on a directory!
Command = tar Arguments = -xf, $P(TarFileBeanID.absoluteInstallLocation)/tarfile
An easy way to get the path to the tarfile is to add a ShortCut Action to the component and in the Target browse to the tar file, select it, copy this, ctrl-c, and Cancel the target selection. Then open the arguments of the Execute Process, ADD and ctrl-v the tarfile! Remember to remove the shortcut! - but, by at least canceling the target after copying it - it will not be added to the installer if it is empty in case you forget to delete it!
