Urgent help needed with dpi

hi guys,

i have to submit an image for our show catalogue… maximum A5 size, (210mm, 148mm)

they want it at 600 dpi for printing but i have cropped and edited some stuff and am hoping if someone can tell me if the image i attach to this is gonna be okay!

i took it with a digicam and imported at 72 dpi… now i know you cant stretch an image but i swear it looks ok when printed! lol