Can you play old Humongous games like Pajama Sam and Putt Putt on your windows 7

Yes you can. When you finish installing the game, right click the icon and go to properties and compatibility. Look in the tab for the right service pack the game can be played in.

^^

The game doeesn't "install" it just starts going. There is never an icon, or a serious ""install"" it just autoruns. There is no "properties and compatibililty" tab, and the properties menu doesn't have anything like you mentioned.