I agree with Betty Lou. If you can manage it, buy a new but keep the old. You can then use a KVM switch to simplify with one monitor, mouse, keyboard and speakers.
I got rid of my old computer running Win ME and had to go to eBay and buy an old compaq as so many games won't run on the faster newer computers. I tried to do a dual boot with 2 HD in the new, but my video card won't run in Win 98se... and I had to lie about the memory and HD size; so I learned the hard way.
Good luck to you!
So many games, so little time.