You have got rid of XP. You just need to edit the C:\boot.ini file to get rid of the boot menu.
Right Click My Computer, Properties, Advanced tab, Startup and Recovery. System Startup, default operating system: if it is not "Microsoft Windows 2000 Professional" /fastdetect , click the down arrow to the right, and select it (i.e. do not use XP as default). Click OK, OK to exit System Properties.
Click Start, Run, type c:\boot.ini and press Enter. The text file will open in Notepad.
Then under the section [operating systems], just delete the line:
multi(0)disk(0)rdisk(0)partition...="Microsoft Windows XP Home (or Professional) /fastdetect
Just delete that line. Click File, Save. Exit Notepad. Restart and you should boot into Windows 2000 without boot menu.