Write name and DOB on the back of each photo
Take 4 small transparent envelops and put each member's pic in small transperent envelop seperately.
Take little big transparent envelop, put all the 4 small envelop in that big envelop.
Write Applicant's Name, file no and DOB on the big transparent envelop containing Photographs. ( you can use sticker also to print name , file no and DOB)