Okay, back to basics:
your tattoo (this is the one click method)
2. Get the flash_image binary, upload it to your device and flash Amon_RA
# /path/to/flash_image/flash_image recovery /sdcard/Amon_RA_recovery.img
Don't forget that you need root-priviledges for this
3. Download any ROM and put it on your SD card.
4. Shutdown your Tattoo and press FIRST Home-Button and then Power Button...you'll get into recovery mode and you can backup, restore, flash an update.zip and so on
Next time you can use the search feature or take a look at the sticky topics here - they are very self-explanatory