diff --git a/OpenRa.FileFormats/FileSystem.cs b/OpenRa.FileFormats/FileSystem.cs
index a260c802a1..648bdac9aa 100644
--- a/OpenRa.FileFormats/FileSystem.cs
+++ b/OpenRa.FileFormats/FileSystem.cs
@@ -73,5 +73,20 @@ namespace OpenRa.FileFormats
 
 			throw new FileNotFoundException( string.Format( "File not found: {0}", filename ), filename );
 		}
+
+		public static bool Exists(string filename)
+		{
+			foreach (var folder in mountedFolders)
+			{
+				var s = folder.GetContent(filename);
+				if (s != null)
+				{
+					s.Dispose();
+					return true;
+				}
+			}
+
+			return false;
+		}
 	}
 }
diff --git a/OpenRa.Game/Actor.cs b/OpenRa.Game/Actor.cs
index e126a580af..83b1ece4c6 100755
--- a/OpenRa.Game/Actor.cs
+++ b/OpenRa.Game/Actor.cs
@@ -71,6 +71,9 @@ namespace OpenRa.Game
 		{
 			get
 			{
+				if (Info != null && Info.SelectionSize != null)
+					return new float2(Info.SelectionSize[0], Info.SelectionSize[1]);
+
 				var firstSprite = Render().FirstOrDefault();
 				if (firstSprite.Sprite == null) return float2.Zero;
 				return firstSprite.Sprite.size;
@@ -107,6 +110,8 @@ namespace OpenRa.Game
 		{
 			var size = SelectedSize;
 			var loc = CenterLocation - 0.5f * size;
+			if (Info != null && Info.SelectionSize != null && Info.SelectionSize.Length > 2)
+				loc += new float2(Info.SelectionSize[2], Info.SelectionSize[3]);
 
 			if (useAltitude)
 			{
diff --git a/OpenRa.Game/GameRules/UnitInfo.cs b/OpenRa.Game/GameRules/UnitInfo.cs
index eb7e0d1ad2..8401ae04ef 100755
--- a/OpenRa.Game/GameRules/UnitInfo.cs
+++ b/OpenRa.Game/GameRules/UnitInfo.cs
@@ -54,6 +54,7 @@ namespace OpenRa.Game.GameRules
 		public readonly string LongDesc = null;
 		public readonly int OrePips = 0;
 		public readonly string Icon = null;
+		public readonly int[] SelectionSize = null;
 
 		public UnitInfo(string name) { Name = name; }
 	}
diff --git a/units.ini b/units.ini
index 09d63fe001..2f63abcc4a 100644
--- a/units.ini
+++ b/units.ini
@@ -544,54 +544,64 @@ MEDI
 Description=Attack Dog
 BuiltAt=KENN
 Voice=DogVoice
-Traits=Unit, Mobile, RenderInfantry, Infantry, AutoTarget
+Traits=Unit, Mobile, RenderInfantry			;; AttackBase, SquishByTank, AutoTarget, dog??
 LongDesc=Anti-infantry unit. Not fooled by the \nSpy's disguise.\n  Strong vs Infantry\n  Weak vs Vehicles
+SelectionSize=12,17,-1,-4
 [E1]
 Description=Rifle Infantry
 Traits=Unit, Mobile, RenderInfantry, AttackBase, TakeCover, SquishByTank, AutoTarget
 LongDesc=General-purpose infantry. Strong vs Infantry\n  Weak vs Vehicles
+SelectionSize=12,17,0,-9
 [E2]
 Description=Grenadier
 Traits=Unit, Mobile, RenderInfantry, AttackBase, TakeCover, SquishByTank, AutoTarget
 FireDelay=15
 PrimaryOffset=0,0,0,-13
 LongDesc=Infantry armed with grenades. \n  Strong vs Buildings, Infantry\n  Weak vs Vehicles
+SelectionSize=12,17,0,-9
 [E3]
 Description=Rocket Soldier
 Traits=Unit, Mobile, RenderInfantry, AttackBase, TakeCover, SquishByTank, AutoTarget
 PrimaryOffset=0,0,0,-13
 LongDesc=Anti-tank/Anti-aircraft infantry.\n  Strong vs Tanks, Aircraft\n  Weak vs Infantry
+SelectionSize=12,17,0,-9
 [E4]
 Description=Flamethrower
 Traits=Unit, Mobile, RenderInfantry, AttackBase, TakeCover, SquishByTank, AutoTarget
 FireDelay=8
 PrimaryOffset=0,0,0,-7
 LongDesc=Advanced Anti-infantry unit.\n  Strong vs Infantry, Buildings\n  Weak vs Vehicles
+SelectionSize=12,17,0,-9
 [E6]
 Description=Engineer
 Traits=Unit, Mobile, EngineerCapture, RenderInfantry, TakeCover, SquishByTank
 Voice=EngineerVoice
 LongDesc=Infiltrates and captures enemy structures.\n  Strong vs Nothing\n  Weak vs Everything
+SelectionSize=12,17,0,-9
 [SPY]
 Description=Spy
 Voice=SpyVoice
 Traits=Unit, Mobile, RenderInfantry, TakeCover, SquishByTank
 LongDesc=Infiltrates enemy structures to gather \nintelligence. Exact effect depends on the \nbuilding infiltrated.\n  Strong vs Nothing\n  Weak vs Everything\n  Special Ability: Disguised
+SelectionSize=12,17,0,-9
 [THF]
 Description=Thief
 Voice=ThiefVoice
 Traits=Unit, Mobile, RenderInfantry, TakeCover, SquishByTank
 LongDesc=Infiltrates enemy refineries & \nsilos, and steals money stored there.\n  Unarmed
+SelectionSize=12,17,0,-9
 [E7]
 Description=Tanya
 Voice=TanyaVoice
 Traits=Unit, Mobile, RenderInfantry, C4Demolition, AttackBase, TakeCover, SquishByTank, AutoTarget
 LongDesc=Elite commando infantry, armed with \ndual pistols and C4.\n  Strong vs Infantry, Buildings\n  Weak vs Vehicles\n  Special Ability: Destroy Building with C4
+SelectionSize=12,17,0,-9
 [MEDI]
 Description=Medic
 Voice=MedicVoice
 Traits=Unit, Mobile, RenderInfantry, AutoHeal, AttackBase, TakeCover, SquishByTank
 LongDesc=Heals nearby infantry.\n  Strong vs Nothing\n  Weak vs Everything
+SelectionSize=12,17,0,-9