Hi,
The booking is module is part of RazorCart.  To install the booking module you need to download and install RazorCart, here is a download link:

https://www.smith-consulting.com/Support/Downloads

Here is a help article to get you started with booking:

http://helpdesk.smith-consulting.com/...h-bookings.aspx

Here is the booking demo:

http://www6.smith-consulting.com/Book-Your-Stay

Cheers

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At your service,
Dave Smith