I just typed in 80,000x60,000 and hit OK and it didn't send up an error message - after looking through the manual (the PDF - none printed yet for V6I) I couldn't find a size limitation.

As far as the dpi - it doesn't matter unless you're specifically going to print - and in that case multiply the dimensions of the desired print by whatever dpi you want and you have your settings: and 8x10@300dpi = 2400x3000 - get it? If you'll be printing at 150dpi then your dimensions would be 1200x1500.

Also keep in mind the larger you are going to print, the lower your dpi of output size can be (this is aided b the fact that you'll be standing further away to view it - you won't be within 18 inches typically) - you can really print at 100-150dpi for something that it 20x30 inches.

And don't go overboard with your dpi for smaller sizes as well - inkjet printers really actually max out at around 360dpi (their tech specs may say more, but in actual practice, they really max out) as they have mulitple nozzles spraying inks as droplets, mixing them to form a line/edge - so it won't be any sharper to render/make an image an 8x10@1200dpi.

And if it renders at 2400x300 at even 10dpi, it's STILL 2400x3000 - get it? It's the very same pixel count. You can just change the setting of the dpi later in Photoshop (or like application - at 300dpi it's an 8x10, at 150dpi it's a 16x20 - very same image!).

hope that helps-
-Lew ;-)