Office 2003 won’t install on Vista. Can’t find .cab files

Help. I can’t get my Office 2003 Standard Student Teacher version to install on HP Pavillion laptop. I have deleted 2007 trial. I have renamed Office registry entries. I have cleaned the CD. I have copied files on CD to C:Temp folder and tried to run install from there. I have tried full, minimum and custom install. No success. Any new ideas?