4' x8' yeah sure, work at 150ppi. That's fine.
But a 30' x 41' banner at 150ppi would be over 14.5 gigs flat! Your printer is gonna hate you! Actually he might laugh when you send in your hard drive...
This post is brought to you by the letter E and the number 9. Those are the buttons I push to get a Twix out of the candy machine.
"I put my heart and my soul into my work, and have lost my mind in the process."