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as you know coppermine has a bridge for xoops, but it uses the other systems user's tables for the user/credentials/login (uses the xoops tables).
one solution i can think of is to install xoops, find a script that imports the users from coppermine to the xoops database tables, then configure the coppermine bridge.
another solution i can think of is creating your own authentication method, but the user would have to login again if they want to edit things in the gallery. that is unless something is done so the cookies would work with the gallery too.
i've never tried the xoops bridge in coppermine, but i've tried some of the others before.
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