I've been reading some posts about the firmware upgrade that enables Powerbook Superdrives to burn more types of media. I have seen alot of posts where people have "heard that it does this" and can "possibly cause that". Who has done this and what were the results? Also, what brand of media works best? I bought a five pack of Imation DVD-R's and they seem to have worked well with Toast 6 for data and video, but they were a little pricey (12.99 for 5, but I realize the bigger the pack, the lower the actual per-disc cost will be).