Karen,
I don't think you will get to 200 shortcut keys, however you can use ctrl or alt or both + an alpha or numeric key provided the combination is not currently used. eg. ctrl + b is already assigned for bold text.
Another approach may be to have a single shortcut key which prompts the user for a code word or number which you then use to programatically call the relevant macro.
eg.
Sub Macro1()
'
Dim MacCode As String
Dim Dummy As Variant
MacCode = InputBox("Enter a Macro Code")
Select Case MacCode
Case "Macro2"
Call Macro2
Case "Macro3"
Call Macro3
Case "Macro4"
Call Macro4
Case Else
Dummy = MsgBox("No Match, Try Again", vbOKOnly)
End Select
End Sub
Sub Macro2()
'
Selection.TypeText Text:="2222222222222222222222"
End Sub
Sub Macro3()
'
Selection.TypeText Text:="3333333333333333333333"
End Sub
Sub Macro4()
'
Selection.TypeText Text:="4444444444444444444444"
End Sub