Linking Forms to Help Files

I have created help for Access DB systems in the past using Word and the
Microsoft help workshop that created .HLP files. I then used the Help File
and Help Context ID properties of the forms to link to the relevant part of
the help.

I have now tried Microsoft's HTML Help tool (that produces .chm files) and
the new help add in for Visual Studio (that produces .HxS files). Neither
of these types of help file seem to work with Access 2003.

What is the most modern tool I can use to generate context sensitive help
for use with Access 2003?

Thanks.

--
Colin Halliday