diff --git a/RosBE-Windows/Root/MinGW.cmd b/RosBE-Windows/Root/MinGW.cmd
index 62a30ae..90b688e 100644
--- a/RosBE-Windows/Root/MinGW.cmd
+++ b/RosBE-Windows/Root/MinGW.cmd
@@ -38,6 +38,7 @@ echo.
 ::
 for /f "usebackq" %%i in (`"%_ROSBE_BASEDIR%\Tools\cpucount.exe" -x1`) do set CPUCOUNT=%%i
 
+doskey CHDEFGCC = "%_ROSBE_BASEDIR%\chdefgcc.cmd" $*
 doskey MAKE = "%_ROSBE_MINGWMAKE%" $*
 doskey MAKEX = "%_ROSBE_MINGWMAKE%" -j %CPUCOUNT% $*
 
diff --git a/RosBE-Windows/Root/chdefgcc.cmd b/RosBE-Windows/Root/chdefgcc.cmd
index 460ed52..aef38d4 100644
--- a/RosBE-Windows/Root/chdefgcc.cmd
+++ b/RosBE-Windows/Root/chdefgcc.cmd
@@ -8,7 +8,9 @@
 ::
 @echo off
 
-title Change the current MinGW/GCC directory...
+if "%_ROSBE_MODE%" == "RosBE" (
+    title Change the current MinGW/GCC directory...
+)
 
 ::
 :: Parse the command line arguments.
@@ -38,7 +40,9 @@ if "%_1%" == "" (
 goto :EOF
 
 :EOC
-title ReactOS Build Environment %_ROSBE_VERSION%
+if defined _ROSBE_VERSION (
+    title ReactOS Build Environment %_ROSBE_VERSION%
+)
 
 ::
 :: Unload all used Vars.
diff --git a/RosBE-Windows/Root/rosbe-gcc-env.cmd b/RosBE-Windows/Root/rosbe-gcc-env.cmd
index a85b8d4..b805d0d 100644
--- a/RosBE-Windows/Root/rosbe-gcc-env.cmd
+++ b/RosBE-Windows/Root/rosbe-gcc-env.cmd
@@ -40,6 +40,12 @@ set LIBRARY_PATH=%_ROSBE_MINGWPATH%\lib;%_ROSBE_MINGWPATH%\lib\gcc\mingw32\%_ROS
 :: Display the current version of GCC, NASM, ld and make.
 ::
 gcc -v 2>&1 | find "gcc version"
-nasm -v
+if exist "%_ROSBE_MINGWPATH%\bin\nasm.exe" (
+    nasm -v
+) else (
+    if "%_ROSBE_MODE%" == "RosBE" (
+        echo ERROR: NASM is required to build ReactOS, none found in the current MinGW/GCC.
+    )
+)
 ld -v
 mingw32-make -v | find "GNU Make"