Atherton & District Amateur Photographic Society

Hi all
I am trying to create up a 900mm x 450mm multiple image poster consisting loads of uniform, small landscape images in b+w. This can probably be set up in Photoshop somehow but I don't think it would create margins.
Does anyone know if there is a set template anywhere (with say 3mm margins) that will allow me to import/drag & drop images similar to a Blurb or Apple book.
I work in Aperture but can't figure out if this will allow me to do it?
Would appreciate help if possible.
Tony

You can create a Contact Sheet in Photoshop and define the number of columns and rows. Alternatively, create your images like we do for the digital competitions and drag them into a black (or any colour) background. After the first one has been resisized just use "Transform Again" to do exactly the same to each subsequent one.

Thanks John - I'll try that. Any probs I'll bring my laptop Thurs.
Best regards
Tony