Photoshop 7.0

Um, using a 5 year old program on a brand new OS, and having it not work is NOT Apple's fault. You didn't have to upgrade to Leopard. That was your choice, and you should have done your research before doing so it it meant that much to you. 
However, you can upgrade to CS3 from 7 (much cheaper) if you want. Otherwise, don't install Leopard, simple as that. No one screwed anyone, you did it to yourself. My goodness, asking one company to maintain support for another company's 5 year old program instead of making necessary upgrades is very very silly. 
Good luck. 

Apple is now Microsoft. They really don’t give a sh+t about customers. Imagine selling Leopard and lot telling the 10s of millions who use photoshop 7 that it will kill the program — you can’t even open it. Lovely -- corporate greed trumps respect for the customer every time.

Unfortunately the "official" word is out. Photoshop 7.0, 7.0.1 is not compatible with Apple's newest Operating System, Leopard (10.5).
Adobe Photoshop versions CS (8.0) CS2 (9.0) and CS3 (10.0) do run in Leopard but may have some issues. The only suggestion I have for you is either revert back to Tiger (10,4) or upgrade your Photoshop to CS3. Adobe offers a discounted upgrade price from 7.0, CS1, CS2 to CS3 for $199. That's a lot better then paying the full retail price of $649.00. I wish I had a better suggested solution for you. You're not alone on this one.

i want supportet softwares