You need to ensure that Windows 7 is deployed on all client computers via multicast and that older client computers..
You need to deploy Office 2010 installation source files to each client computer, without installing Office 2010
You need to ensure that existing Office installations do not interfere with your 64-bit Office 2010 deployment
You need to ensure that users can edit the specific Word and Excel files and that all other Office files are validated before being opened