I have used The Logo Creator in the past for simple banners and logos and find it a great piece of software. Recently I had thought about creating various images for use in Zazzle for t-shirts, etc. Per the Zazzle site, images for t-shirts must be 1200 pixels x 1500 pixels at 150dpi. Other product lines have various other dimensions and DPI requirements. How do I accomplish this? I appreciate your help!