diff --git a/default_sc.cfg b/default_sc.cfg
index 520d128..73c5f23 100644
--- a/default_sc.cfg
+++ b/default_sc.cfg
@@ -8,6 +8,10 @@ alias pronoun_xey    "impulse 26"
 alias pronoun_ze_hir "impulse 27"
 alias pronoun_ze_zir "impulse 28"
 
+set sc_cheats    0
+set sc_lives     0
+set sc_dist_ammo 0
+
 echo "To change your pronouns in-game use one of the pronoun_ commands."
 echo "You can get a list by typing 'pronoun_' and pressing tab."
 
diff --git a/source/defs.qc b/source/defs.qc
index 99c26af..25f204e 100644
--- a/source/defs.qc
+++ b/source/defs.qc
@@ -269,6 +269,8 @@ string(string s) precache_file2 = #77; // registered version only
 // set parm1... to the values at level start for coop respawn
 void(entity e) setspawnparms = #78;
 
+float(string s) checkextension = #99;
+
 // constants -----------------------------------------------------------------|
 
 const vector VEC_ORIGIN = '0 0 0';
@@ -632,6 +634,8 @@ float sf_dist_ammo;
 float player_respawned;
 float all_players_are_dead;
 
+float ext_con_set;
+
 // fields --------------------------------------------------------------------|
 
 // world fields
diff --git a/source/world.qc b/source/world.qc
index 6767499..ac9ae2d 100644
--- a/source/world.qc
+++ b/source/world.qc
@@ -17,6 +17,12 @@ void() worldspawn = {
 	lastspawn = world;
 	InitBodyQue();
 
+	if(cvar("pr_checkextension")) {
+		if(checkextension("DP_CON_SET")) {
+			ext_con_set = TRUE;
+		}
+	}
+
 	// custom map attributes
 	if(self.model == "maps/e1m8.bsp") {
 		cvar_set("sv_gravity", "100");
@@ -184,12 +190,18 @@ void() StartFrame = {
 
 	teamplay   = cvar("teamplay");
 	skill      = cvar("skill");
-	temp1flag  = cvar("temp1");
 	framecount = framecount + 1;
 
-	sf_cheats    = (temp1flag & SF_CHEATS) != 0;
-	sf_lives     = bit_shift_right(temp1flag & SF_LIVES_MSK, SF_LIVES_BEG);
-	sf_dist_ammo = (temp1flag & SF_DIST_AMMO) != 0;
+	if(ext_con_set) {
+		sf_cheats    = cvar("sc_cheats");
+		sf_lives     = cvar("sc_lives");
+		sf_dist_ammo = cvar("sc_dist_ammo");
+	} else {
+		temp1flag    = cvar("temp1");
+		sf_cheats    = (temp1flag & SF_CHEATS) != 0;
+		sf_lives     = bit_shift_right(temp1flag & SF_LIVES_MSK, SF_LIVES_BEG);
+		sf_dist_ammo = (temp1flag & SF_DIST_AMMO) != 0;
+	}
 
 	if(all_players_are_dead) {
 		delta = time - all_players_are_dead;
diff --git a/todo b/todo
index e668344..c7aa565 100644
--- a/todo
+++ b/todo
@@ -9,11 +9,12 @@ rename all functions to be lower_underscore
 
 core features:
 
-add registercvar support
+all done
 
 useful features:
 
 configurable enemy stats
+impulse command for spectating
 indicators for where other players are
 users can cancel map ends ("<name> initiated travel to <mapname>")
 
@@ -28,6 +29,7 @@ third person player weapon models
 
 done:
 
+add registercvar support
 corpse pickups have keys
 custom pronouns
 distributed ammo