I'm currently using Version.2.3.9(leaked froyo from months ago) and am thinking about updating it to the latest OTA version. I do have 2.1 & 2.2 sbf files, rom manager(not installed), titanium backup(installed), z4root(not installed), and bootstrap(not installed). I have modified build.prop file as well. What would be the easiest way to install the latest OTA version without losing the data? Can I flash the sbf file and update it to the latest version then restore the data? Thanks in advance.