How to make my custom AdminSite class use my custom login/logout views?

[Stodge]

I have a custom AdminSite class working but now I'm trying to work out the best way to make it use my custom login and logout views. I supposed I could copy chunks of code from Django's admin sites.py and make it use my views. But this is a hack. Is there a standard way of using custom login/logout views in the admin site? Thanks