check previous postings. digital cameras generally take pics at 4:3 ratio. if you print 4R size (3:2 ratio), the top and bottom will be cutoff. Rather than leaving to the shop to do the arbitrary cutting off, you might want to do it yourself. Search previous postings for more information.
Contrary to what camera makers like to tell you, 1600 x 1200 (2megapixel) is enough for up to an 8R/A4 print. Trust me. I have done it over 3 years, print dunno how many 8R from my 3 year old Coolpix 950 already.
In 1999, they tell you 2 megapixel can print 8R.
In 2000, they still tell you 2 megapixel can print 8R.
Dunno what they tell you now, I think it's just "can print big".