I've written my own VB6.0 FPSC launcher too.
Here's what I use to launch the HTML help file.
'in your form module
'for shell out to a file
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hWnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
Const SW_SHOWNORMAL = 1
'behind your command button
ShellExecute Me.hWnd, vbNullString, "index.htm", vbNullString, App.Path & "\help\", SW_SHOWNORMAL
Change the ShellExecute line above to suit your needs
If you need more help... check out www.allapi.net
Good Luck!
Rocky Raccoon