sorry to say but that didn't help, maybe I have faults on my side! Let me explain the problem.....
First I can select the particular movie from a movie-list.
Download all the data( Title, Year, cast, credits, Poster(ThumbSize)) needed from the main page, it also includes an address to the page where fullSize posters are located.
As per your suggestion I carefully studied the allmovie.psf script, though am not much into scripting but tried. Here in the array declaration every array element has a predefined value(smCast, smReview, smCredits...) , but how to supply an array/list to the "getDownloadURL" function when the number of posters in that particular page that I may collect with the while-do-begin-end instruction is unknown!