1. Place weapon_glow.efx into root/mods/mapname/fx/

2. In mapname.gsc

after

[code]maps\_zombiemode::main();[/code]

put

[code]	weapon_glows = GetEntArray( "weapon_upgrade", "targetname" );
for(i=0;i<weapon_glows.size;i++)
weapon_glows[i] thread glow_weapons();[/code]

3. Find
[code]//level.DLC3.myFX = ::preCacheMyFX;[/code]

uncomment it by removing //

4. Find preCacheMyFX()

add

[code]level._effect["weapon_glow"]	 = loadfx("weapon_glow");[/code]

so it looks like
[code]
preCacheMyFX()
{
level._effect["weapon_glow"]	 = loadfx("weapon_glow");
}[/code]

5. At the bottom of mapname.gsc

add

[code]
glow_weapons()
{
self.tag_origin = spawn("script_model",self.origin);
self.tag_origin setmodel("tag_origin");
playfxontag(level._effect["weapon_glow"],self.tag_origin,"tag_origin");
}
[/code]