XP Mode is the easiest solution for software that runs good in XP but not Windows 7. It is basically a virtual machine with a free copy of XP provided by MS. I have had very good luck with it, one of the best features is that once a program is installed to the XP Mode virtual machine, you don't have to start the virtual machine to run that program. The program in question will appear in your Windows 7 Start Menu under
Windows Virtual PC >
XP Mode Applications and when you want to use it will run in the XP environment virtually transparent to you.