On what color background in Quark will the drop shadows fall?
since you don’t have tansparency in Quark. you need to make sure the background in Photoshop is the same as your background in Quark. now drop your flattened photoshop tiff into into Quark.
If you were using InDesign you could use transparencey from Photoshop or dropshadows in ID.
Another method is to create a separate image for the shadow as grayscale and saved as a tif image. Place in Xpress in the desired location and stacking order and set the image to overprint in the trap settings. Also, you must note this when sending off to your printer.
Printers will turn off Xpress’s trap settings to allow their inrip trapping to take care of the file. Not noting this may cause inattentive prepress to miss it causing delays in the prepress portion.
Then, as mentioned there is InDesign which simplifies the process considerably.
Unfortunately or fortunately the best way to do this is with an extension called Shadow Caster form A Lowly Apprentice or the Quark Effects from Extensis.
It essentially automates all of this stuff and you will be able to end up with what seems to be shadows going over photos, type and backgrounds in any combination.
fairly easy to use and very good results.
Bu the best way to do what you want and you will get better shadows is with InDesign as has been mentioned.
If you don’t have PS CS this may be a good time to upgrade get the whole suite for a lower price than InDesign alone.