Hello,
yes, you can book as admin in 1.6.0 version. There is new way in admin part of the website. But what Joomla do you use? I think you have Joomla 2.5, right? There is better way. We can modify your old order to Book it! 2 for free. Actual version is 2.0.3.
When I made this upgrade on my localhost, I didn't find any problem. Our customers have some problems, but it looks like most of them are problem with installations, plugins of 3rd party and new ACL settings.
You can see all customer problems and instructions in this topic:
www.artio.net/de/support-forums/booking/...-1-6-0/seite-5#39286
Problem with version 1.6.0 is that it is no more compatible with Joomla 2.5.