I have not tried this on an a1000, but it works great on my a500 and a2000. I see no reason why it wouldn't work on the a1000.
1. Boot kick 1.3 from disk in normal fashion.
2. Use mkick (see aminet) to softkick 2.04 or even 3.1
this method would not free up the 256k wom (unless mkick has the feature)