few questions: 1.Should i copy SD card to my computer before rooting? 2.Will all apps that have been downloaded and purchased be remembered in the market, via g-mail account, so i don't have to pay for them again? 3.Can a ROM manager(ClockworkMod ROM Manager) make it so i can easily switch between ROMs? 4.Do certain kernels come with certain ROMs, or any recommendations 5.What are the advantages/disadvantages/point to change radios? I'm new to rooting and really want it mainly to have different looks on my phone, and have free wifi tether. Please add in any other perks that you guys love.