sda4: commit the Glaze developer hard-drive dump

Un-ignored: the dev drive is the ground truth the restoration and
emulator work constantly reference (DPL3/LIBDPL + VRENDER i860 renderer
source, BT/RP live+dev game trees, VGL_LABS pod boot, scene/audio
content). Kept in-repo for the pod-owner community.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

sda4/BTDAVE/BTPREP.BAT

@@ -0,0 +1,44 @@
+@echo off
+rem
+rem usage:  btprep.bat  [course [vehicle [dropzone [inifile]]]]
+rem
+rem ------------------------------------------------------------------
+rem L4ANIMATION=scale     (default = 1.0  NEVER make zero or negative)
+rem ------------------------------------------------------------------
+set L4ANIMATION=1.0
+rem ------------------------------------------------------------------
+if "%1"=="" set a1=arena1
+if not "%1"=="" set a1=%1
+if not exist maps\%a1%.map goto nomap
+rem ------------------------------------------------------------------
+if "%2"=="" set a2=thor
+if not "%2"=="" set a2=%2
+if not exist models\%a2%.mod goto noveh
+rem ------------------------------------------------------------------
+set A4DPLCFG=
+if "%4"=="" goto bt
+set A4DPLCFG=%4.ini
+if not exist %A4DPLCFG% goto noenv
+rem ------------------------------------------------------------------
+:bt
+call makeegg.bat %a1% %a2% %3
+call bt.bat temp
+goto end
+:nomap
+echo.
+echo Course '%a1%' not found.
+echo.
+goto end
+:noveh
+echo.
+echo Vehicle '%a2%' not found.
+echo.
+goto end
+:noenv
+echo.
+echo Renderer configuration file '%A4DPLCFG%' not found.
+echo.
+goto end
+:end
+set a2=
+set a1=