zmrp_smalltown_fixed :D

This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below:

• steamapps
  • common
    • garrysmod
      • garrysmod
        • addons
          • Screenshots <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• Screenshots/
  • zmrp_smalltown0000.jpg
  • zmrp_smalltown0001.jpg
  • zmrp_smalltown0002.jpg
  • zmrp_smalltown0003.jpg
  • zmrp_smalltown0004.jpg
  • zmrp_smalltown0005.jpg
  • zmrp_smalltown0006.jpg
  • zmrp_smalltown0007.jpg
  • zmrp_smalltown0008.jpg
  • zmrp_smalltown0009.jpg
  • zmrp_smalltown0010.jpg
• READ-ME.txt
• zmrp_smalltown_fixed.bsp

krzysztofbalina008, david.m.g_16, tbuesod, HqRewix, villaalec80, jan2908, arthurdrayner, redshangrysdino00s, jennifer.dumont51, Elfuerte13100, Lordcrafter04, gabybarrocos, azrildyu, nycolas.tabosa, oefe3034, owenlrios, banettetejode.yt.2.0, Tôm, huntsilverfur2000, Flice, JohnZick, joaobonnie, Amiyr, loxenamex-1585, austyboy82, oxigaloxy, bellito-bryan, Gresh627, mossesx, shadowsbetray, günthra, sasherz, ShaunDash, ShaunDash, ppdua, CrazyCritical89, MartinBro, Poseido, ballesteroaxel173, cumhurkinalioglu, Cheerleader, Tum Burn [TH], iliashishkin.pro, ◢ k r i s ◤, joeyjeancharles72, alexshulski, GabrysZRT, Belzebass, Allan3140, Dubstep_T +106 others