Congrats for finding the same video tutorial I watched the very first time I started using Max!
Regarding blueprints, if it's a Boeing aircraft, they have free AutoCAD .DWG's and .DXF's for download on their site here:
http://www.boeing.com/boeing/commercial/airports/3_view.page
I've found some to be very accurate, while others look rather cheesy and unrealistic. You just have to try several and see which ones are good. They have some fantastic blueprints for a 737-400 that I downloaded a while back, and those might have been better than the ones in that tutorial (which you have to buy).
What kind of aircraft are you modeling? Surely I've come across blueprints for it at some point in time...