Mxmlc -context-root and [Embed(source="/data/img.jpg")]

Hi.

I am using free Flex 2 SDK on Windows XP.
It came with mxmlc.

Current project directory structure:


proj_root/
         src/
         data/

All .as files are in proj_root/src/.
All .jpg files are in proj_root/data/.

In proj_root/src/Main.as:

[Embed(source="/data/img.jpg")]

I compile it with a batch file:

 
    @echo off
    mxmlc src\Main.as -output main.swf -context-root "%~d0\%~p0"

%~d0%~p0 expands to absolute path of proj_root (build.bat is in proj_root).
However, I get this error:
Error: unable to resolve ‘/data/img.jpg’ for transcoding.

I can use relative path …/data/img.jpg or /…/data/img.jpg

Is there a way to use /data/img.jpg instead of above 2 versions of relative path?

Thank you.