The plasma_radar_v1_0.zip file you have requested: Mods / Graphical Tweaks / Plasmagun Radar - 22.93kb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
This mod is quite creative: it adds a radar to the plasma gun! It can detect any Doom 3 creatures that falls within its range and uses an effect "a la Alien" to pinpoint their location. The readme file even includes a story outline for it.