sed -i and lineend

[olli]

Hello

I have GNU sed Version 4.1.4 from
http://gnuwin32.sourceforge.net/packages/sed.htm under Windows2000

if I use the -i option every time I get as a result a file with UNIX
lineends despite the original file is a DOS-file. Without the -i option
the original DOS-file isn't converted to Unix but for my problem I need
in-place-substitution.

Is there a simple solution (no further step like sed -n p) I can
integrate into my one line script?
Thanks in advance

oliver