In Outlook 2000 - where/how do you tell it to open ready for your reply to go to the bottom of a message vs the top of the message you are responding to?

I have an auto sig for replies and regardless of whether using Outlook or Word for the editor, it always places the reply sig and cursor at the top of the message I am replying to. As I am frequently making comments within the original message, I would like my sig file at the bottom. For the life of me, I am unable to find the option to make this change.

Must be obvious or I could find it.