Here is the Readme for this mutator:
// BloodyMess mutator. Rewrite of a couple of The Danes code fragments
// into a functional mutator. By Mr.Loathsome and The Dane. v4.0 04/16/2011
Put BloodyMess.int, BloodyMess.ini and BloodyMess.u into your UT\System folder.
Select the mutator when you play.....
For servers, add BloodyMess.BM to the mutators section of your
serverline and add BloodyMess to your ServerPackages section of your
UnrealTournament.ini file. uz file for your redirect also included.
v4.0 Add bGBPlus variable.
v3.5 Add Green Blood support.
v3.2 When bRandLevel=True, SpurtLevel variable now used as max value.
v3.1 some performance tweaks implemented.
v3.0 now includes BloodyMess.ini config file.
bHeadshotOnly=False // Only spawn effect on headshots. True or False.
bRandLevel=True // Random SpurtLevel. True or False. Range will be (5 - SpurtLevel)
bGBPlus=True // If True, all Pupae and Sliths will have green blood.
SpawnRate=0.330 // Controls max # of effects per seconds that will be spawned. Range (0.025 - 20.0)
SpurtLevel=60 // Controls how high the drops will spurt.
NumDrops=80 // Controls both # of BloodDrops & Decals.
// Allowed Range for both (1 - 512). Recommended range (10 - 120).
Note, if you experience lag with this, try increasing SpawnRate by small amounts. i.e. 0.10 or 0.20.
Next item to adjust for performance, would be to reduce NumDrops.