Ztex has images for LX75 and LX150 FPGAs, you're probably out of luck with the smaller devices on the 1.11. However, source code is available and xilinx ISE webpack edition (free) will support those, so you COULD get something running on the 1.11 with some work on your part. Source code is on this page:
http://www.ztex.de/btcminer/#download