The Windows Installer XML (WiX) toolset is needed.
Download it from here: http://wix.sourceforge.net/

To produce an .msi file:
* Open the command prompt (cmd.exe)

Run these two commands in cmd.exe
* \"Program Files (x86)\WiX Toolset v3.6\bin\candle.exe" speller_msi.wxs
* \"Program Files (x86)\WiX Toolset v3.6\bin\light.exe" speller_msi.wixobj

The uuid's in speller_msi.wix was produced with uuidgen on linux

The package places the files in (on Børres (virtualbox) Windows XP, at least):
C:\Programfiler\Divvun

The files installed there are:
mssp3samiNorthern.lex
mssp3samiNorthern-NO.dll
mshy3samiNorthern.lex
mshy3samiNorthern-NO.dll
mssp3samiNorthern-dic.lex

The register values that are written is found in speller_msi.wix