So, I have a print file measuring 8400 x 1998 pixels. Now, I would like to print this as big as possible, going with 240 PPI. This would yield a print 35 inches long by 8.325 inches long. What are your thoughts on being able to stretch this print up to 12 inches tall? Would it be possible through interpolation/upsizing of the print using CS4? My calculations yield that if it could be made 12 inches tall, it would be 50.4 inches long. Thanks in advance.