"Converting" files for use on BatchPCB?

Hi all,

This is undoubtedly a clueless question, but I’m still compelled to ask. I found a project supplied in a format which I’m not sure I can use here on BatchPCB. You can see the Gerbers in the ZIP at http://rodolphe.czuba.free.fr/Museum/CTR14_Layout.zip

Inside the Gerber directory are several files which I can guess at, like CTR-SOLT and SOLB, I imagine being the top and bottom solder. There seems to be a DRL, but there is actually more than one. And what is the Aperture file?

Basically I’d like to produce this project (it’s for a memory expansion for an Atari Falcon030 computer) without having to re-draw the art from the provided layouts. I’d never be able to get the measurements down perfectly, so if these gerber files are useful in some form, can someone let me know how?