Have worked with a company (called Oakleaf) in the past that uses a version of BackTraq, but as I recall they provide a few tweaks and adjustments to suit the needs. Might be worthwhile hooking your Estates people up with them to see if they can help make life a little easier. The company specialises in Estates software, so if they don't already know of them, they'd probably find other things on their shelves that would help the day-to-day.
That's my $0.02
