You can look up custom help forms in Access. If you want this to show up as a web site, which I have done a la Adobe PhotoShop Help, do this:
Dim sLink As String
Dim objExplorer As Variant ' ? Or just dim with no type
sLink = "C:\PathToHelpFile\index.htm"
Set objExplorer = CreateObject("InternetExplorer.Application")
objExplorer.Visible = 1
Does this help?