INITRD Question

I am recompiling my 2.4.4 SuSE 7.2 kernel with the Win4Lin patches. My system is running RAID 0 hardware (Promise FastTrak100-lite) controlled with reiserfs. I am not able to boot because the orignal initrd file points to the reiserfs & ft modules of the orignal kernel. How do I create a new initrd with the newly compiled kernel & modules when I can't boot into it? RH has a mkinitrd X Y command where X is the initrd filename and Y is which kernel version is relevant. Is there something similar in SuSE? Thanks PCHintz