wow, alot of ideas--- for a 'iphone like app interface' type look front end, the first one i thought of is centrafuse. another one would be ride runner, but would need a different skin, and i am not sure if they have one that would directly meet the requirements...
there are other members that have reformed/refabricated their dash-- this is no small undertaking, and definatly takes longer than the attention span of a 10 yo

. look in the fabrication area for those. you could also look around the web for fiberglassing techniques---(i have not done any fiberglass, short of researching it, so do with this what you want)-- most of the members that do fabrication here usually recommend doing a small project first before tackling a large project-- like fiberglassing a switch or two into a custom made mount, so you can get used to the techniques and methods needed to achive a specific look.
also, most screens will fit into a 1 or 2 din opening, but there is nothing specifically for 1.5 din-- some members have placed a screen right behind the opening, and it is fully visible(pontiac grand am/grand prix), but for the most part, most members either go with a motorized 1 din screen, or refab the dash for a larger screen (if you chose to refab the dash for a different screen, why not go for a 10" or larger screen?). and most vga screen also have av inputs, so the backup camera/ps2 should be workable.