Problems moving files old hard drive converted into external drive on to internal drive

Hello, I just bought a new dell inspirion 530. I have taken my hard drive from my dimension 8250 and turned it into an external hard drive. I am trying to take pictures and other files from this external hard drive and put them on to my internal drive of my new computer. The issue I am having is that when i try to transfer the files i am told that I do not have permission. I can't even view them. I have gone to a couple individual pictuers and went to the properties tab, then security tab, and assigned myself as the owner and it has worked for a couple picutres. I have a lot of picutres and it would take forever if I had to do this individually. Any help would be greatly appreciated, thanks in advance! PS the actual message reads "You don't currently have permission to access this folder."

I just hooked up the external drive to my macbook pro and it worked flawlessly!  Darn Vista!