SP3 for Office Xp Standard
 

I cannot install SP3. Initially the installation process failed for lack of
OUTRET.MSI, which I obtained, then nex for lack of Office1. CAB, which I also
obtained.
Now installation stops halfway through with error message 1402, cannot
obtain access to UNKNOWN\.png.
I can't find this in the registry.
I don't know whether I really need SP3, but have already wasted a lot of
time on this and would be grateful for help in finally resolving.