The source files used to install office. They are usually on CD/DVD or a network share.
They are the people who set up your office computer, setup your email, recover your forgotten passwords, recover your accidentally deleted emails and files, fix your computer, setup the servers, and answer questions like this.
.exe
Purchase an upgrade version of Office 2007 and install. It will replace the Office 2003 program files with the appropriate Office 2007 files. Your data files will remain unaffected. You can use all of your Office 2003 data files with Office 2007 (but Office 2007 files may not be backward compatible for Office 2003).
You can store setup files on a Hard Drive, Flash Drive, CD, DVD, or you can create a folder in c:\windows\temp
yes
You can not. You need to save the files from Office 2007 in compatibility mode if you want to open the files with an older version of Office.
RPM files are cheap and easier to setup than distributions files
You need to open the files with the appropriate Office 2007 program and save in compatibility mode. You usually cannot open Office 2007 files with Office 2003.
HP Mini 1140NR is the easiest to setup anywhere.
SFC
RISetup.exe
You sure can! You can also run Microsoft Office files with Openoffice. Microsoft office will run Openoffice files in compatibility mode, with very minor differences if any.