That's it -- works as well under VC6 as it ever did now.

PC/VC6/rt.bat

+@rem Run Tests.  Run the regression test suite.
+@rem Usage:  rt [-d] [-O] [-q] regrtest_args
+@rem -d   Run Debug build (python_d.exe).  Else release build.
+@rem -O   Run python.exe or python_d.exe (see -d) with -O.
+@rem -q   "quick" -- normally the tests are run twice, the first time
+@rem      after deleting all the .py[co] files reachable from Lib/.
+@rem      -q runs the tests just once, and without deleting .py[co] files.
+@rem All leading instances of these switches are shifted off, and
+@rem whatever remains is passed to regrtest.py.  For example,
+@rem     rt -O -d -x test_thread
+@rem runs
+@rem     python_d -O ../../lib/test/regrtest.py -x test_thread
+@rem twice, and
+@rem     rt -q -g test_binascii
+@rem runs
+@rem     python_d ../../lib/test/regrtest.py -g test_binascii
+@rem to generate the expected-output file for binascii quickly.
+@set _exe=python
+@set _qmode=no
+@set _dashO=
+@goto CheckOpts
+:Again
+@shift
+:CheckOpts
+@if "%1"=="-O" set _dashO=-O
+@if "%1"=="-O" goto Again
+@if "%1"=="-q" set _qmode=yes
+@if "%1"=="-q" goto Again
+@if "%1"=="-d" set _exe=python_d
+@if "%1"=="-d" goto Again
+@if "%_qmode%"=="yes" goto Qmode
+@echo Deleting .pyc/.pyo files ...
+@%_exe% rmpyc.py
+%_exe% %_dashO% -E -tt ../../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+@echo About to run again without deleting .pyc/.pyo first:
+@pause
+:Qmode
+%_exe% %_dashO% -E -tt ../../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+@set _exe=
+@set _qmode=
+@set _dashO=