While I save up for a full frame DSLR, and/or consider getting a 4x5 field camera for occasional use, I am currently using a 10mpixl point-shoot. I'd like to find out the best methods for big enlargements - up to 20x30. I've heard that in Photoshop (CS4), you can maintain high quality by increasing image size in small increments. 110% at a time, rather than doing it in one step. Which type of algorithm should be used? I've heard that you should select the one that is 'best for smaller size'. I'm sure software plugins , such as Fractal, are perhaps best for this. But is it realistic to get to 20x30 from 10mpixls just using Photoshop ?