tucker1975 isn't completly correct as you can get portable programmes. These can be installed on any portable drive and used from it anywhere. Check out Portable Apps click here I use these on a pen drive. It does what it says on the lid.
masterf has three threads running at the moment all seem to point to upgrading a P/Bell.
I think this question is about taking the programs from the PBell and storing them while he changes a hard drive. We have already talked about drive cloning to allow him to transfer windows an installed software programs.