I'm lost, if it is a ROM, a kickstart ROM, then you don't need to copy it into ram (softkick) as a software patch. You need to copy the ROM into RAM and reset your pointers (FastROM), if that is what you are intending to do.
Calling a kickstart a ROM is a misnomer. The Amiga 1000 WOM is another good example. How useful is Write Only Memory?