About the files that contain handmadeguns content packs

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    I installed the Handmadeguns Mod in Minecraft Forge 1.7.10 and started the server, but the handmadeguns_Packs and handmadeVehicles_Packs folders, which should be automatically created at startup, are not created. When I try to create them myself, I get a "cannot create this file" message. How can I create them? Can the content pack itself be installed before that?