Change MIME type of compiled web plugin dll?

I was going to bump my previous thread, but then I realized that its title was misguided, so many people would ignore it.
My request is now slightly become more guided.

What I have is an NPAPI plugin DLL.
In order to make it useful, it needs to be possible to change values in this DLL through an external program.
I can change almost all of the required variables using a hex editor, but I can not find the values for MIME type, file version, file extensions, description, etc... They must be easy to access, since the web browser and OS reads that kind of stuff routinely.
The other string, which I could find and succesfully change with the result of instant alteration of the program, says "Cube\Cube.exe".

Help would be appreciated.

Download for the DLL is here:
http://crumbsoftware.f2o.org/files/npPlugin.dll

This is the resource script that I am using, which contains the magical values:

// Microsoft Visual C++ generated resource script.
//
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "winresrc.h"

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

/////////////////////////////////////////////////////////////////////////////
//
// Version
//

VS_VERSION_INFO VERSIONINFO
 FILEVERSION 1,0,0,0
 PRODUCTVERSION 1,0,0,0
 FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
 FILEFLAGS 0x1L
#else
 FILEFLAGS 0x0L
#endif
 FILEOS 0x40004L
 FILETYPE 0x2L
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904e4"
        BEGIN
            VALUE "CompanyName", " "
            VALUE "FileDescription", "Grasshopper Browser Plugin"
            VALUE "FileExtents", "bic"
            VALUE "FileOpenName", "npPlugin"
            VALUE "FileVersion", "1, 0, 0, 0"
            VALUE "InternalName", "npPlugin"
            VALUE "LegalCopyright", "Copyright © 2005"
            VALUE "MIMEType", "application/testPlugin"
            VALUE "OriginalFilename", "npPlugin.dll"
            VALUE "ProductName", "Grasshopper_Plugin"
            VALUE "ProductVersion", "1, 0, 0, 0"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1252
    END
END


#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//

1 TEXTINCLUDE 
BEGIN
    "resource.h\0"
END

2 TEXTINCLUDE 
BEGIN
    "#include ""winresrc.h""\r\n"
    "\0"
END

3 TEXTINCLUDE 
BEGIN
    "\r\n"
    "\0"
END

#endif    // APSTUDIO_INVOKED

#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//


/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

Edit:
Aha! ResHacker.
It looks like I can call ResHacker through the command line, which is good.
Is there any code for B3d, or command line tool, that allows me to modify a string in a compiled file? (The task done above by a hex editor).

Actually... I'm having trouble running ResourceEditor through the command line. Are there any good alternatives?