diff --git a/apps/dsm/mods/mod_utils/ModUtils.cpp b/apps/dsm/mods/mod_utils/ModUtils.cpp
index 6c588f76..4c773490 100644
--- a/apps/dsm/mods/mod_utils/ModUtils.cpp
+++ b/apps/dsm/mods/mod_utils/ModUtils.cpp
@@ -44,7 +44,8 @@ MOD_ACTIONEXPORT_BEGIN(MOD_CLS_NAME) {
   DEF_CMD("utils.spell", SCUSpellAction);
   DEF_CMD("utils.rand", SCURandomAction);
   DEF_CMD("utils.srand", SCUSRandomAction);
-
+  DEF_CMD("utils.add", SCUSAddAction);
+  DEF_CMD("utils.sub", SCUSSubAction);
 
 } MOD_ACTIONEXPORT_END;
 
@@ -160,3 +161,40 @@ EXEC_ACTION_START(SCUSpellAction) {
     sc_sess->playFile(basedir+play_string[i]+".wav", false);
 
 } EXEC_ACTION_END;
+
+
+CONST_ACTION_2P(SCUSAddAction, ',', false);
+EXEC_ACTION_START(SCUSAddAction) {
+  string n1 = resolveVars(par1, sess, sc_sess, event_params);
+  string n2 = resolveVars(par2, sess, sc_sess, event_params);
+
+  string varname = par1;
+  if (varname.length() && varname[0] == '$')
+    varname = varname.substr(1);
+
+  // todo: err checking
+  string res = double2str(atof(n1.c_str()) + atof(n2.c_str()));
+
+  DBG("setting var[%s] = %s + %s = %s\n", 
+      varname.c_str(), n1.c_str(), n2.c_str(), res.c_str());
+  sc_sess->var[varname] = res;
+
+} EXEC_ACTION_END;
+
+CONST_ACTION_2P(SCUSSubAction, ',', false);
+EXEC_ACTION_START(SCUSSubAction) {
+  string n1 = resolveVars(par1, sess, sc_sess, event_params);
+  string n2 = resolveVars(par2, sess, sc_sess, event_params);
+
+  string varname = par1;
+  if (varname.length() && varname[0] == '$')
+    varname = varname.substr(1);
+
+  // todo: err checking
+  string res = double2str(atof(n1.c_str()) - atof(n2.c_str()));
+
+  DBG("setting var[%s] = %s - %s = %s\n", 
+      varname.c_str(), n1.c_str(), n2.c_str(), res.c_str());
+  sc_sess->var[varname] = res;
+
+} EXEC_ACTION_END;
diff --git a/apps/dsm/mods/mod_utils/ModUtils.h b/apps/dsm/mods/mod_utils/ModUtils.h
index 0e97ce21..f43ca0e6 100644
--- a/apps/dsm/mods/mod_utils/ModUtils.h
+++ b/apps/dsm/mods/mod_utils/ModUtils.h
@@ -38,5 +38,7 @@ DEF_ACTION_1P(SCGetNewIdAction);
 DEF_ACTION_2P(SCUSpellAction);
 DEF_ACTION_2P(SCURandomAction);
 DEF_ACTION_1P(SCUSRandomAction);
+DEF_ACTION_2P(SCUSAddAction);
+DEF_ACTION_2P(SCUSSubAction);
 
 #endif
diff --git a/apps/dsm/mods/mod_utils/Readme.mod_utils.txt b/apps/dsm/mods/mod_utils/Readme.mod_utils.txt
index 58e2b6f5..94b0282f 100644
--- a/apps/dsm/mods/mod_utils/Readme.mod_utils.txt
+++ b/apps/dsm/mods/mod_utils/Readme.mod_utils.txt
@@ -23,3 +23,11 @@ Actions:
  utils.srand() 
   seed the RNG with time().
 
+ utils.add($var, val)
+   add val (float value) to var. also 
+   utils.add($var1, $val); utils.add($var, #param)
+
+ utils.sub($var, val)
+   subtract val from var
+
+