This should be a pretty simple answer, but I haven't found it while searching... So I recently rooted my Evo and am running the stock Rom with Amon RA recovery (awesome by the way). I wanted better battery life, etc. so I flashed a Kernal (backup then wiped Cache, Dalvik, etc. first) and it all went smoothly- everything is running great. My question is- should I leave the original Kernal .zip file on the root of the SD Card, or remove it? I know that when I installed Amon RA, I had to remove the .zip file after so it wouldn't keep asking to install in bootloader or whatever, but with a Kernal is it the same? If it doesn't matter, is there an advantage to keeping it there? I guess the same question could be asked for ROMs too- so feel free to offer suggestions for that too. Thanks for the great advice- Rooting has opened up a new world for me!