"Basically, I just want to dual boot with windows 2000 and the Fedora install, but do I need to do anything to remove/modify the current install of SUSE 9.0 and GRUB before I go ahead and try and install Fedora?"
Back up your data before you install. Have the Fedora installer format all of your Linux partitions during the install. Tell the Fedora installer that you want to dual boot Windows. After the install restore your data.
I installed Fedora Core 1 to replace SuSE 8.1. I did it by installing Fedora to dual boot with SuSE and copied my data from SuSE to Fedora after Fedora was stable. Then I formated the SuSE partitions and changed grub to single boot Fedora.
Be prepared. Create a LifeBoat CD.