MapInstall won't work because I don't have a GPS to connect to my computer. I just want to be able to view the maps on my computer and print off the ones I need. Maybe that's the problem. Aside from that, upgrading to Snow Leopard has made my laser printer obsolete, (it's not even two years old). Lexmark, my printer manufacturer, doesn't make a driver for 10.6, only 10.5. I contacted Apple and they suggest reloading the 10.4 OS. The downside is that going back to 10.4 will delete all the data on my hard drive. To make matters worse, I just spent a small fortune on three new high yield toner cartridges for my printer. I don't expect you to solve my problems, but I thought I should let you know.