Do you know someone near you with a PC and DVD writer that you can "borrow" to burn?
If yes, create your ISO out of Encore and copy to a USB flash drive and take to your PC friend
Have them install the FREE http://www.imgburn.com/index.php?act=download to write your ISO to disc (send the author a PayPal donation if you like his program)
If that DVD works, do you have a Mac program to make copies?