I have a somewhat tricky situation. I have an old Mac Mini (mid 2007 model) that I would like to upgrade to Lion. However, the only way to get Lion these days is through the app store. But the Mini only came with Leopard, which doesn't have the app store. Since I have several modern Macs, I purchased Lion anyway (thinking I could download and install it on a USB stick and use that to reinstall the old Mini) and it is now in my Purchased list. However, the stupid app store refuses to let me download it on any of my other Macs, saying "This version of Mac OS X cannot be installed on this computer". Duh, I know that, but I want to download it anyway! Is there some trick how I can create an installation medium of my purchased Lion?