I do have a CONFIG.SYS.
I did try editing the HIMEM file but I just broke things further -- despite restoring a back up of it. I can't select any Extended or Expanded memory load-outs now or the system hangs. I think my method of backing up/restoring my Autoexec is what screwed things up to begin with. Basically I had I just opened it with EDIT, Saved AS a .TXT file, then later on opened the .TXT and saved it as a .BAT.
My CONFIG.SYS:
DOS=SINGLE
[COMMON[
DOS=HIGH,UMB,NOAUTO
FILES=40
BUFFERS-40
LASTDRIVE=H
[menu]
menuitem=EMC, Expanded Memory + Mouse + CD -ROM
------ the rest here is just a list of memory load-outs from Phil's PIF.
[EMC]
DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:OFF
DEVICE=C:\WINDOWS\EMM386.EXE RAM
DEVICEHIGH=C:\DRIVERS\VIDECDD.SYS /D:OPTICAL
[XMC]
DEVICEHIGH=C:\DRIVERS\VIDECDD.SYS /D:OPTICAL
[CMC]
DEVICEHIGH=C:\DRIVERS\VIDECDD.SYS /D:OPTICAL
[EM]
DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:OFF
DEVICE=C:\WINDOWS\EMM386.EXE RAM
[XM]
DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:OFF
[CM]
[E]
DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:OFF
DEVICE=C:\WINDOWS\EMM386.EXE RAM
[X]
DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:OFF
[C]
I copied over and replaced the entire WINDOWS folder from a back-up I made on my main computer. That fixed the hanging and issues with Expanded/Extended memory load-outs, but I still can't get out of DOS.