Trust me, I did Google the question first 
I'm wondering if I can install Workbench 3.1 on my Amiga 3000. If possible, using only software solution. I don't mind buying a ROM chip tough, but I couldn't find one for the Amiga 3000.
I'm kind of a noob, I've read some places that I could ReKick the 3.1 Kickstart, but not sure how to proceed.
If I can't buy the chips or install it in a software solution, how can I install back my Workbench 2.1 if I don't have the disks.
ReloKick just relocates kickstart onto faster 32bit accel ram if you have it. You need the roms installed first..
Gertsy