I have a used Lenovo T61 w 4gb ram and 100gb HD running w7 Ultimate 32bit but I do not have the installation disk or the OS installation key. I also have a new w7 Pro installation disk w key code and a 750 gb hd which I plan to use to install a 64bit OS replacement of the existing OS and HD. Once I install the new OS in 64bit, is there a way to migrate programs installed in the Program Files directories or do I have to reinstall everything?