what u do is dl adobe cs5. it doesnt matter where u get it from really. then u want to dl a keygen for adobe cs5. after both are done downloading, disconnect from the internet. install adobe using the keygen. when you enter the key it will appear as a green check or a red ex. if it is red x then use a different key. once it is green go into ur firewall. I am not sure what firewall you use but what u want to do is block the photoshop.exe from accessing the internet. once adobe is blocked from the internet then you should be good to go and you can connect to the internet. if you dl the one above then they should also have some instructions that will probably work. i just prefer the firewall method. If you allow the program access to the internet then it will find out that ur key is wrong and will tell you that u need to buy it and u only have a certain number of days to try it out.