Ah hah,
This could be a bit painful depending on how much you have to copy but if you go into the formula edit window and select the contents then do Copy or CTRL-C, close the edit window and then go to the required cell on the new book and Paste/CTRL-V, the formula will be copied verbatim.
Another option would be to just duplicate the whole workbook and clear the constants if that is the sort of thing you have in mind as an ultimate outcome.
Or you could try the methods outlined here
http://spreadsheetpage.com/index.php/tip/making_an_exact_copy_of_a_range_of_formulas_take_2
and here
http://spreadsheetpage.com/index.php/tip/making_an_exact_copy_of_a_range_of_formulas/
Hope this helps.
Harry