Zend Optimiser -- wide spread??

Hi all, I'm close to releasing my first widely distributed (I hope) PHP application, and I wish to protect the source with Zend Encoder. Seems easy enough. However, this is a low-cost app that was intended to work on basic installs of PHP, running on almost any server -- it uses no external libraries, and required no special compiles. Is Zend Optimiser (required to run encoded PHP files) part of a base installation, or at the very least, is it widely spread in use (available on most hosts)? Seems like there's no point encoding if only half of the servers out there can run the scripts. I know optimiser is available on *my* host, but that's not enough in this case! --- Justin French http://indent.com.au