Im trying to install Jboss application server remotely and need to first generate an xml installation script to do it...is there another way?

It seems the versions of the jems-installer on your website do not have the option to generate an xml installation script as outlined in the documentation:
http://docs.jboss.com/jbossas/guides/installguide/r1/en/html_single/

Is there a way to generate this xml installation script?