Installing the iPrint xClient fails on a 64-bit computer because of a dependency on 32-bit XULRunner. You can resolve the dependency by doing either of the following:
Install the zypper install novell-iprint-xclient-sl-6.502.20090805-4.x86_64.rpm package to resolve the dependency on 32-bit XULRunner and install the iPrint xClient on a 64-bit machine.
Install the zypper install mozilla-xulrunner190-32bit package to download 32-bit XULRunner. Then you can install the iPrint xClient on a 64-bit computer.