Query Assistance Needed

[Jeremy Stewart]

My SQL-Fu isn't where it needs to be at this point for me to get what I need out of these tables. Any and all assistance is appreciated:

table: schedule
+---------------------------------------------------------------------------------------------------+
|-- schedid -|-- start -----------|-- end --------------|-- desc -----|--tid--|--loc1----|--loc2----|
+---------------------------------------------------------------------------------------------------+
|-- 1 -------|-- 2012-1-24 0:0:0 -|-- 2012-1-24 1:0:0 --|--'blahblah'-|-- 3 --|- 100.102 |- -100.1 -|
+---------------------------------------------------------------------------------------------------+

table: bookings
+-----------------------------------------------------------------------------+
|-- bookid -|-- start -----------|-- end --------------|------ lotid--|--tid--|
+-----------------------------------------------------------------------------+
|-- 1 ------|-- 2012-1-20 0:0:0 -|-- 2012-1-20 1:0:0 --|------3-------|---3---|
+-----------------------------------------------------------------------------+
|-- 2 ------|-- 2012-1-25 0:0:0 -|-- 2012-1-25 1:0:0 --|------3-------|---3---|
+-----------------------------------------------------------------------------+

table: lot
+------------------------------------------------------+
|-- lotid --|-- desc ------------|-- location----------|
+------------------------------------------------------+
|-- 1 ------|-- My Place 1 -|-- 123 1st street --|
+------------------------------------------------------+
|-- 2 ------|-- My Place 2 -|-- 123 2nd street --|
+------------------------------------------------------+

What I want:
I'm generating a schedule of up coming events. This needs to be all scheduled & booked events where the start 'start' field is greater than or equal to the current date & time.

I could always generate separate queries and sort them myself, but I'd prefer to come up with a query that contained both the scheduled events & the booked events ordered by the start field.

I appreciate any help provided.