OK, create a paragraph style called "Footnote Text Red" and apply it to the Footnotes that need to go inline when you run the macro.
Code:
Sub MoveFootnotesIntoText()
Dim RngSrc As Range, RngTgt As Range, f As Long
For f = ActiveDocument.Footnotes.Count To 1 Step -1
With ActiveDocument.Footnotes(f)
Set RngSrc = .Range
Set RngTgt = .Reference
RngSrc.End = RngSrc.End - 1
If RngSrc.Paragraphs(1).Style = "Footnote Text Red" Then
RngTgt.Collapse wdCollapseStart
RngTgt.FormattedText = RngSrc.FormattedText
.Delete
End If
End With
Next
Set RngSrc = Nothing: Set RngTgt = Nothing
End Sub