I've never used this method either, because email had to be sent unattended for the app I built. Could you not just move your template body text to the sub and modify the body? You might have to wrap the body text in HTML tags to control the font.
svName = Forms!frmMyForm.txtFName & " " & Forms!frmMyForm.txtLName
svBody = "Hello " & svName & ";" & vbCrLf
svBody = svBody & 'your template text
With oItem.Subject = "SAMPLE EMAIL SUBJECT"
.Attachments.Add strAtt, olByValue, 24
.Display
.To = "test2@testing.com"
.Body = svBody
End With