I'm a Solaris and Debian/SuSE weenie, and I need some help setting the IP address of the remote web interface on an IBM 550

I plugged the port labled HMC1 to the network. The "network" is really a small linksys router that I use to test internet configs, as I can change the settings at will and not affect anyone. Anyway:
While leaving the settings for HMC1 at default (dynamic, 192.168.2.147 255.255.255.0) I changed the settings of HMC2 to static, 10.10.10.111 255.255.255.0 10.10.10.1 , and entered 2 DNS servers which are not reachable from where I am.

Now, I can't get a connection to either HMC1 or HMC2 (server taking too long to respond).
I can ping both the static IP on HMC2 and the dynamic IP of HMC1, which changed accordingly as the linksys is serving DHCP

So, the questions are:

Am I missing something?
Is there a way to set/reset the HMC IP configuration without access to the HMC GUI itself?
Is there a way to configure the HMC through the serial console?

Any help or guidance will be greatly appreciated.