First off, feel free to post at the latest BFL thread anytime! Now on to your questions:
1. Of course, working out in the AM is preferable - for me, it prioritizes it and gets my workout out of the way every morning. But I do know a lot of people at
www.leanandstrong.com (a GREAT place to visit for BFL info by the way!)
do work out later in the day, because of work, kids or whatever. I'm not 100% certain of this, but I believe as long as you workout at least 1 hour after your last meal and wait 1 hour before eating after cardio (after strength training, you are encouraged to eat immediately afterwards) you'll be okay.
2. you do *NOT* need supplements to do BFL. A multivitamin is encouraged - but you would be taking that anyway right? BTW, meal replacements (such as Myoplex Lite) are NOT considered supplements...I usually use 2 Myo Lite shakes (NOT the bars) a day...but many people at L&S do 6 'real food' meals per day. Just stick to lean proteins, whole unprocessed carbs and lots of veggies - using the palm/fist method of measuring, and you can't go wrong!
Speaking for myself, I am doing the six meals a day. Usually no problem for me (except for yesterday - that was due to bad planning on my part!). IMHO, if you want results, you really should do BFL as outlined in the book - just commit to it for 12 weeks - read the book again (ESPECIALLY the chapter on "Crossing the Abyss" - SO important!).
As far as the 20 Minute Aerobic Solution - if you have an aerobics class that you enjoy, by all means keep doing it - but IN ADDITION to your 20 MAS. Pre-BFL, I was a total cardio bunny - 1+ hours on the elliptical 6 days a week, an INTENSE Spinning class twice a week, plus lots of cycling (and wondering why I wasn't losing weight the way I wanted to!). When you do the 20 MAS or HIIT the way it's outlined in the book, and you hit those 9's and 10's, believe me, you will hardly be able to stand at the end of 20 minutes!
Hope that helps - some of the other BFL gals may chime in here.
Another place to check is this site:
www.hussman.com/eas