The mappack112.zip file you have requested: Maps / Official Map Packs / RA2 / Red Alert 2, Offical Mappacks 1 through 12 - 2.8mb is not available. Perhaps try browsing all files for the game C&C: Red Alert 2 and upload any files you want to share or are missing. This is the only information we could locate:
I decided, to have all the Offical Maps that Westwood made for Red Alert 2, but never came with it. So you would have to go download the map packs from somewhere. Well I combined all 12 mappacks into one file, so you need only to download 1 file, instead of 12, and upzip it to you Red Alert 2 directory.