[link|http://www.di2.nu/200608/01.htm|Qana-llywood]
The best evidence of prior planning is not to be found in Qana but in Beirut where, as Powerline noted, a large banner was printed up and displayed just hours after the "event". The banner's text clearly refers to the Qana deaths ("The massacre of children in Qana 2, is the gift of Rice. The clever bombs..Stupid") but the banner would have taken [link|http://israelmatzav.blogspot.com/2006/08/wondering-more-about-qana-and-30-foot.html|a day or more to produce].
Since I do banners like this for a living, I can tell you it take more than a few hours depending on the equipment. A banner that large can be done one of two ways. With a grant format printer. It would probably take about 3-4 hours to print, then hours more to sew and grommet so it could hung....The other way it to use a smaller series of machines all color calibrated and produce sections. At that point they would have to be stretch the length of the banner ( read large facility) and sewn together. ...Just putting an image together that large on a computer with Type would take a few hours. Then color tests, proofs and finally printing. That would be an all day affair for most print houses even with a grand format printer.