Tips for preparing your files: RGB files are best, you do NOT have to convert to CMYK. Adobe 1998 or Prophoto RGB are Suggested working color spaces. You can supply us with a CD, DVD, Hard drive, Flash Drive Laptop Ipod etc!. When choosing a file format use a Tiff (.tif) or photoshop (.psd). Only use jpeg if it is an original digital camera file. If the file is from illustrator, InDesign or Quark you may keep it in the native format. Output resolution should be at least 180 dpi for most artwork, 240-360 is best when possible. If you have a digital camera file we can up-res it here for you to the desired output size. Check scans closely for dust as you will be enlarging them much more than normal so dust spots can become more visible. When possible calibrate your monitor, this will ensure the most predictable results. Affordable screen calibration is available at colorvision.com. If you are not calibrated at least set your monitors color temperature for 6500K which is the D-65 standard for print. Feel free to call or email with any other questions.