Update..........
Well I tried reinstalling SH3. ACT. and the resfix files. After having first deleted any evidence of the previous install inc. those from \my docs\ and patching to 1.4
Tried using my correct res of 1600X1200 and screenshot, result 1024x768.
Then tried altering the .cfg to it's default 1280x1024 and screenshot, result 1024x768.
FWIW I even tried making the .cfg read only in desperation, but to no avail.
Something is really screwy here, my last resort is a complete format and reinstall os and sp2

.
Any more suggestions are very welcome.
Best regards,
Fubar