iPod Touch 2G

Unfortunately whited00r firmware isn’t available for MC models.

Whited00r Download

iPod Touch 2G WD5.1

Apple Original Firmware

If you would like to restore an official un-modded firmware from Apple, here are the .ipsw that you need:
iPod Touch 2G 3.1.2
iPod Touch 2G 3.1.3
iPod Touch 2G 4.2.1