Step 3

You have 3 choices to flash a custom ROM:

An Android 2.1 Custom ROM (With Sense) (Based on the official 2.1 update)

The ROMs off VillainRom.co.uk are very stable and cool!
Choose the standard one for sense, SuperHero for preformance and SlideVillain for looks.
Does Require Wipe

Or you can choose a different ROM from XDA...

How to Flash
  1. Once you have a ROM, rename it to update.zip and copy it to the root of your SD card (ie not in any folders)
  2. Then get into recovery mode (by turning on holding home)
  3. Using the trackball, select 'backup' then 'NANDROID Backup' (If you need to restore it then NANDROID restore)
  4. If your ROM requires a wipe (Check on the ROM page) then select 'wipe' from the menu then 'wipe data' This will erase all your data but not stuff on your SD card.
  5. Select 'apply sdcard:update.zip' and wait for it to finish.
  6. You have successfully rooted your HTC Hero!