Regarding the BSI Car Rental booking system from Code Canyon, you've mentioned several known issues that you've been facing. Firstly, you're planning to handle the template layout integration yourself, which is a good approach. As for the booking system locking up at the confirmation page, it seems to be an unknown issue that occurs three times. Additionally, the system is not sending confirmation emails to clients or admins, which is a crucial feature that should be functioning correctly at the confirmation page.
You've also pointed out concerns about the poor design and layout of the confirmation page, and you would like to have a print page button available for clients as well. Furthermore, the front page widget needs fixing or an add-on because it fails to redirect to the booking page upon submission, causing layout issues and confusion.
