Just read through this pdf:
http://www.megaupload.com/?d=X0I9TGOZIt's from the jungleflasher website and will have everything you need in the pdf, it is even in a nice flowchart design to walk you through step by step :p
And things to download:
The latest Jungleflasher from
http://jungleflasher.netIXtreme LT v1.2 for BENQ from here:
http://www.mediafire.com/?tmi5im1xzolHope that helped, ask if you have anymore questions

Also moved this thread to the help section.