DerKeeper666: Found a solution:

Try editing this section of /scripts/player/MoveState_Normal.hps:

// Head Bob
cVector2f gvCrouchBobMax = cVector2f(0.06, 0.04);
cVector2f gvWalkBobMax = cVector2f(0.03, 0.03);
cVector2f gvRunBobMax = cVector2f(0.05, 0.06);
cVector2f gvCrawlBobMax = cVector2f(0.09, 0.03);
cVector2f gvEnergyBobSize = cVector2f(0.1f,0.2f);

float gfCrouchMinBobSpeed = 0.2;
float gfCrouchMaxBobSpeed = 1.2;

float gfWalkMinBobSpeed = 0.4;
float gfWalkMaxBobSpeed = 1.8;

float gfRunMinBobSpeed = 0.5;
float gfRunMaxBobSpeed = 2.5;

float gfCrawlMinBobSpeed = 0.2;
float gfCrawlMaxBobSpeed = 1.0;

I imagine setting the first 5 lines to using (0.00, 0.00) should do it.