What I would like is to have a ahk script (or compiled .exe) to do this
take all the photos I have in a folder eg C:\mypics\resize and resize them keeping aspect ratio
preferably with a choice eg 640/480 320/240 obviously the second dimension you wouldnt get if it kept aspect ration it would just be a guide (but I could probably change this myself in the script)
the scipt could use the .exe of irfanview or image magick, I have both - or anything free!