1. Steve is right about *.dos files. They are used to boot in previous DOS only and you can leave them alone.

2. REM means the line is not used and you can safely remove such line.

3. As for RAM M3 switches: RAM switch used to create both UMB (Upper Memory Block) and EMS memory. M3 places EMS page in C800 segment which in most computers located just above video BIOS thus preventing UMB to break into 2 non-continuos areas. In some rear cases it really can caused some conflicts with video or some other BIOS.
In such case I can recommend you the next configuration:

Config.sys:

dos=high,umb
files=199
buffers=32,0
device=c:\windows\himem.sys /testmem:0ff
DEVICE=C:\WINDOWS\EMM386.EXE RAM
devicehigh=c:\realmode\oakcdrom.sys /D:mscd001

Autoexec.bat

@ECHO OFF
SET BLASTER=A220 I7 D1 T2
SET SNDSCAPE=C:\WINDOWS

If you still not have enough memory try:

1) To remove Files=199 line from Config.sys file (by default Windows use Files=60 value and I think you hardly need more then that)

2) To replace RAM switch with NOEMS in Emm386 line. In that case you will not have EMS memory but the size of UMB will increase.

3) To remove Oakcdrom.sys line. You don't need that real mode driver to access cdrom drive from Windows.

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Good luck, Igor M

[This message has been edited by Igor M (edited 10-03-99).]