This can be done..........

table tblContacts = fID (autonumber / index
key),fName,fAddress,fWhatever,................

frm_1    select
frm_2    edit

frm_1
add one lstBox, than in the properties of this lstBox edit the following:
   [Format] Column Count = 2, Column Widths = 0; (note the semicolon) (the
0 lenght hides the fID field bound)
   [Data] Row Source = tblContacts, Bound Column =    1
   [Event] On Dbl Click = [Event Procedure] (paste below code in VBA
editor)

   'Private Sub lstContacts_DblClick(Cancel As Integer)
   Dim stgFilter As String, stgWhere As String

   stgWhere = "[fID]=" & Me.lstContacts
   DoCmd.OpenForm "frm_2", acNormal, stgFilter, stgWhere, acFormEdit,
acWindowNormal
   DoCmd.Close acForm, Me.Name, acSavePrompt
   'End Sub

frm_2
in the properties of the form itself edit
   [Data] Record Source = tblContacts
   [Event] On Close = [Event Procedure] (paste below code in VBA editor)

   'Private Sub Form_Close()
   DoCmd.OpenForm "frm_1", acNormal, , , acFormEdit, acWindowNormal
   'End Sub

Now add all the required data field on the form (any from your table
tblContacts).

SAVE ALL

Now if you open form frm_1, select a contact and double click on the lstbox,
frm_2 should open and frm_1 closes. Once you close frm_2, frm_1 opens again.

This is all I can think of now, hope this does the trick for you.

Success,
Ludovic