Printing alot of 2.5x3.5s

[Sam443]

Any advice for printing 150 plus 2.5x3.5s I would like to put 6-8 on one sheet of paper. Looking for a

Mac program to help with this. Using photoshop then pasting them all could take a while. Epsons film

factory works great but does not hav a 2.5x3.5 size.