Hi. I need to produce a banner which will be about 2m by 2.5m high. The spec from the printer says to produce the artwork at a quarter size and 600dpi so they can enlarge it. I'm just concerned about some of the photos I'm going to use. For example, one is going to end up about 50cm square. The photo that was taken was originally 144dpi and about 45cm square in size. I have resampled it in photoshop to 300dpi and on the quarter size artwork it will be about 12cm square. I'm using indesign cs3 and the printer said a hi res PDF will be fine, but how do I produce a 600dpi PDF from indesign? Or do I need to make sure that all the images I use are actually 600dpi? I just want to make sure the photos will be ok when enlarged ss I'm not to familiar with the process that will be used.