If you already know the document's name, the sheet's name and the table's name, the easy way is :
--
--Here you may replace the three values by the current ones
set dName to 1
set sName to 1
set tName to 1
tell application "Numbers" to tell document dName to tell sheet sName to tell table tName
tell first cell of the selection range to set {rowNum1, columnNum1} to {address of its row, address of its column}
tell last cell of the selection range to set {rowNum2, columnNum2} to {address of its row, address of its column}
end tell
--
Yvan KOENIG (VALLAURIS, France) mercredi 9 février 2011 17:22:21