rooting nexus s 4g w/ ics problems

[kanucme]

so i went to nexushacks.com and followed instructions for rooting my newly ice creamed nexus s 4g.
i went through the process but the phone got stuck on the flash step.

now when i flash into recory i get the little android figure with a red triangle and even when i tried the other ways to get into recovery and tried to install superuser zip it says that the signature was not verified.