Hey all, i have a copy of Photoshop which i am having trouble installing, i have a clean serial number and it keeps telling me its invalid. Im not using beta SN's as far as i know, not the 1045 series. I have the 220mb (dmg) full file. Is there anything i need to know or should be checking to make sure it installs correctly. And am i allowed to ask these kinds of questions here? This copy is for my personal use only. Thank you for your time and help.