Thank, that's how I got it working.
It didn't come with an A2090 or A2091 hard disk controller.
What would be the best option for adding a hard drive?
Like the other poster said, the A2091 is the easiest and cheapest way to get HD in A2000. The A2091 cames also with 2MB RAM (fully populated), so you are partially covered in the RAM department
Also, in my opinion, try to get v3.1 ROMs for it, much easier to operate then v1.3, and if you want full backwards compatibility get the ROM switcher.