Sandro, just to expand on a point Norman made earlier. If someone else opens
any of these files then those functions will not work for them as they are
stored in YOUR personal.xls on YOUR computer only, so if you are sharing these
files with anyone else, you may actually want to store them in that file, or go
the addin route as suggested.
Think about what happens if you leave that job and someone else takes over -
Your personal.xls is tied to your userid if you are on a network, so even if
someone else logs onto that PC, if they are under a different logon then these
functions will not be available to them. Even on XP, if you have different
accounts then you will have the same issue. The data should stay intact when
they open the file, but if they try and use the same function then they will get
prompted with dialog boxes looking for a file containing that function to link
to. May not be an issue, but just so you are aware.