To install Visio 2k3 + SP3 in cx 7 pro for linux I had to use the following easy kludges:
First, the wiki told me that Visio2k3 breaks in the presence of a full Office 2003 install. So I installed it into an empty bottle.
Finally, the Visio2003SP3-KB923620-FullFile-ENU.exe update failed looking for .CAB files. By copying all the .CAB files from the CD into ~/.cxoffice/BOTTLE-NAME/drive_c/windows/Installer/ (BOTTLE-NAME should be substituted with the name of the bottle with Visio 2003 installed -- in my case, "win2000"), this problem disappeared and SP3 went in fine.