I used easy cd creator 5 and did the following:
click on file then click on Cd project properties
Then select file system ISO 9660 "which is nero's default data disc format"
then in area that says volume label put "Mediatek"the disc's name....
Then under physical format of CD select Mode 1.
Then selcet "save this as default" because you'll be burning at least two disc's. Worked fine.
I used a cd-rom disk --what's the advantage of using cd-rw. I don't think the machine backs up old firmware to it anyway.