The big problem you will have to address is getting the wedding dress detail without blown highlights. The bride will not be pleased, even if she says she is, if the photos show her in a bland white nothingness. If you get the highlights under control you will be able to lift the shadows easily in Photoshop.
Remember that digital cameras have less dynamic range than film and this can be disasterous at a wedding. You will have to experiment with a white sheet or something similar in the garden before the big day to see how it works out. You may be suprised at how easily the whites can be lost with less than top of the range digital.
-------------------- David.
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I see the world thro' a viewfinder, but the world watches me via CCTV!