I have a 6mb Canon EOS Digital Rebel.  I�ve taken a RAW picture which shows to be 36mb.  I�ve then converted it to a high quality (12) JPEG image with dimensions of 3400x5100 and 5.61mb.  My concern is that I am trying to submit to a website which demands �48mb minimum uncompressed file size�.  They later state to interpolate images to a minimum of 48mb using professional upsizing software.  I have Photoshop CS, does this mean I need to take the JPEG image and increase the dimensions until the file goes from 5.61mb to >48mb or am I looking at this completely wrong ?

Thank you for your help !!!