how do I add a kernel?

[Thomas Adams]

I want to add an additional kernel so that I can switch between them at boot 
time depending on which SCSI adapter the hard drive is connected to. How do I 
do this? I searched within dpackage for "kernel" but did only find two binary 
images without mentioning if and which SCSI stuff they support. I know I was 
asked which controller I wanted to support at installation but it doesn't seem 
possible to reproduce this and then add the appropriate kernel to the 
harddrive and update lilo, is it?