I have a 500GB Momentus XT Hybrid drive in my 13" 2.53gHz MBP. I updated from firmware SD24 to 25 with no problems by burning the .iso image file onto a CD and booting from that. However when I now have tried to do the same to update now from SD25 to SD28 (supposed to work better with Lion and the recovery partition), my MBP will not recognise the burnt CD with the new SD28 .iso file as bootable. I have downloaded the .iso file twice and burnt two discs, using different Macs with the same result. I tried to force it to boot from the CD by holding down the C key, while starting - no joy. It has been suggested that I copy the .iso file to my iMac, connect the MBP to the iMac with an FW400/800 cable (I have one) and restart the MBP in target mode. However I am not sure how then to run the .iso file on the Momentus XT HD, now in target mode. Both MBP and iMac are running 10.7.2. Any suggestion folks? Wilson ---------- I also have a bootable version of Lion on an SD card, so could put the .iso file on that and boot the MBP from there.