Bulk change ESX hosts console IP address

Hi,

I have about 200 ESX 4 hosts, and I have to change the IPs of every hosts vswif0 Console Interface.

Has somebody any suggustion, best practice? (if available, I would welcome a gui based solution, or script sceleton).

I have more questions about scripting:

- It seems, I have to use Plink

- I have to accept every SSH key on connection.

Regards,

Akos