My schoolmate then asked me several questions about Windows, you can check this site www.tiplord.com
tip 1: thnx to @dik for this tip (enabling cd-rom thru DOS)
[[fOR config.sys]]
device=\himem.sys
device=\oakcdrom.sys /d:mscd001
files=30
buffers=60
[[for autoexec.bat]]
\mscdex.exe
/d:mscd001