Probably the only way is to either dual boot into XP or else install XP in a virtual machine using VMWare Player or Virtual Box (both free). But, it does require that you have a licensed copy of 95/98/Me/2000/XP.
XP Mode MIGHT work as long as the game doesn't require any Direct 3D acceleration. I believe it is written with 16-bit color, so you MIGHT be able to use XP Mode which in that case, you can get a copy of an XP Image from Microsoft. You do have to be running Windows 7 Professional but you don't have to have a CPU that can handle hardware virtualization (at least with the latest patch to the XP Mode).