how to Make older programs run in this version of Windows

Compatible problem may arise. It cannot run on this version.

Some older programs might run poorly or not at all. If a program written for an earlier version of Windows doesn't run correctly, use the Program Compatibility Wizard to change the compatibility settings for the program. To change settings for a program manually, use the individual program's Compatibility tab.

If changing the settings does not fix the problem, go to the program manufacturer's website to see if there is an update for the program.
For more :http://windows.microsoft.com/en-IN/windows-vista/Make-older-programs-run-in-this-version-of-Windows

Well, all older programs have its new version now compatible with new version of all windows.. So just go for new version of all programs.

it may nt be compatible

Older program. may run if they are compatible with of OS version otherwise update your old program.