My support is not something I have experience with. Transferring the game is easy enough if you have the PS2 version of it. On the other hand, transferring it on the Mac isn't as easy. You can use the Click To Download Click To Play utilities that come with a lot of Mac games though.
If you have a physical copy of Red Alert 3, you can head on over to Amazon.com and get the digital download version of the game. If you don't have a copy of the game, you can order it online and get it shipped to you for free. If using the Amazon support (for the custom thing it does), the best thing you can do is provide the five digit Amazon Access Key code that came inside the box with the game itself.
You can also contact customer service at Amazon.com to get this kind of support. One way to accomplish this with Amazon is to provide the Access Key number with your complaint, along with a detailed summary of the issue and any screenshots or results you may have compiled to document the problem. Make sure to include this key with your email.
With all the editing and repair work to the discs, it's also a good idea to write down ALL the codes that come with the game. If you only have the CD version, you can still get a digital version of the game by seeking out online websites that sell games for either a physical copy or digital copy. In addition to the codes you get from Amazon, you'll also want to include the PSN code , d2c66b5586