However,
You could try to perform a Host Check verification with installation enforcement for the ICA client.
As mentioned here before you provide the web-link when the hostchecker noticed that there is no citrix client installed.
What files are you searching for? Would be neat if you could name as I haven't worked yet with the new xen citrix.
What is necessary to provide the Java fallback? Is on the client side just the JRE required?
AteRocKz