Yes it is. The easy way is by using lilo to boot Win2k. Look the the lilo man page. Extra simple, just add an entry for the Win2k hard drive. And make sure lilo is on /dev/hda and not /dev/hda#. Where # is your linux partition number.
The hard way is to copy the linux bootsector from your linux drive and copy it onto the Win2k drive, then add a line o boot.ini to make it an option. I use this so I can have a neat little menu.
I'm at school now, so I can't get the procedure for you, but if you're interested I'll get it for you later.
If you look on http://www.deja.com/usenet you might be able to find the procedure someone who's done it. I think that's where I found out how to do it.
It's essentially just a dd command to make the bootsectir file, then copy that onto the Windows partition. Then edit boot.ini.
-John