2 requests for cpg1.5

[fwhsdesigns]

I have 2 simple (or I hope they are) requests for CPG 1.5
1st request is replace thumbnail - What I mean by this is if you don't want the whole image to show and just part or replace the thumb with a generic image.
2nd requests kind of goes with the first. A nudity flag. If an Image is found to contain nudity (I deal with 3d Artist) and they upload an image that has frontal nudity I would like to flag it for that and replace the thumb with a generic image or words. Some of the sites I visit have this option but I am not sure what they use for galleries (Renderosity is one of them).