if its like mine the screen does not show anything, you cant get into bootloader or recovery screen. Well I think it goes into bootloader as RSD lite can read it but it will not show anything on the screen.
I think my problem was trying to install the CM9 kernel as I used the same process and left out flashing the CM9 kernel and it worked perfect, Lucky some one that helped me get my phone working again suggested this to me.
So I now have ICS working by just installing it and Gapps and left out the CM9 kernel :P
Not sure if that is what you are trying to do but you should be able to flash a new rom with what I said above. Just making sure its the same BL version as your previous install