does anyone know if you can fit disc brakes on on a 2000 home grown frame

Yes, the older hayes brakes will fit the disk taps if they are mounted to the chainstays. I have also seen a post on the forum once for a company that makes an adapter to mount IS standard disk brakes to the older style mounting holes. Hope that helps.

does anyone know if you can fit disc brakes on on a 2000 home grown frame

I mounted Avid Mechanicals to my 2000 4-banger. I bought an adapter direct from a2zcomponents.com it was 20 bucks or so. You need to use a 180mm or larger rotor with the adapter. I used the 185mm that came with my Avids and I had to shim the caliper with some additional washers to get it to work. Now that everything is dialed in, they work great. No problems. The model is the"ad-pmr" parallel mount to international standard mount adapter.