Just from a quick look I would say it is your resolution. As Ben said, you'll want 300dpi, no if ands or buts so be sure you've got that covered. If you're having color problems then you'll want to play with hue/saturation in PS. Image> adjustments> hue/saturation. There are other options that are fun under image> adjustments, like brightness/contrast. Each scanner works a little differently but I would just look for those cookie cutter settings that are most likely built in and pick whatever sounds like the best it's got. On my scanner there is a "best color photograph" ... well that sounds like the coolest setting she's got so that's what I use but I always scan at 300dpi. Your PS file then needs to be 300dpi also, and you might also be sure that your scan is being saved as a file such as jpeg or tiff. Once you've got that you might have to make the choice of using CMYK or RGB. Uh, those aren't exactly digital terms so you might know what they mean? I use CMYK. I was sort of a press printer in school so we used CMYK. Your printer will use CMYK and so on. The web and your monitor like RGB. Uh to be real honest, unless you're hard core glossy magazine editor extraordinaire then just use whatever you want. There is some conflict when it comes to print if you use RGB but 9 times out of 10 you aren't going to run into problems. My only suggestion is that whatever you use, use it in everything you do - scan, Photoshop, Illustrator, whatever. On a side note, I have to do the scan in parts thing too ... just the nature of not being able to afford a giant fancy pants scanner. It works fine. I don't keep my line art in my final, so my digital camera works even better, except it's not in CMYK and I have to change it, oh well. It doesn't have NEAR 300dpi kinds of resolution so that might not be feasible for what you're looking to do. If you're getting into 7 or 8 mega pixels then yeah, you should be alright using a camera. It's quicker than scanning. *shrugs*
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