I did both LL Total and Lite, and personally I wouldn't recommend switching straight from one to the other. Mentally it's TOO MUCH. I haven't encountered ... anyone actually who did this successfully (unless someone proves me otherwise? Though I think Spangly may be the only one that I know of!!

). My weight losses were actually pretty similar on both plans - I read somewhere - based on research of two groups doing VLCD's - one sticking to the calorie count of the Total program (550?) and one sticking to the Lite (800ish) - the losses were pretty much exactly the same.
The mental shift from abstinence (no decision making at all) to suddenly having to plan a whole balanced MEAL - when on abstinence you have a neurosis about small things such as having a slice of lemon in our glass of water - how do you think having an entire meal would affect this type of mindset? Not very well.
I don't think you should mix the two plans. If you're doing abstinence - I would fully recommend doing the full 12-week RTM. It teaches you so much about what food you actually may have a small problem with and what your weak points are - because the introduction is so slow. Lite RTM is only 4 weeks and is nowhere near as comprehensive.
I did Total followed by 12-week RTM. Then a couple of months later I started Lite to finish getting to goal - when I was mentally ready for it. Lite on it's own (after a period in the 'real food world') taught me so much about portion control and what my body actually needs food wise. It was an eye-opener for sure, and cemented a lot of staples that have stayed until this day - such as a good selection of vegetables every day (which pre-LL did not exist!), healthier lunch options - soups (before LL, unthinkable!) and generally no unecessary snacks in the house.
I think to make a successful transition from Total to Lite you need an extremely solid determination to reach your goal and no doubt in your mind over how to achieve it. Your body/brain chemistry MAY, however, go into overdrive, so be very careful. LL puts our body into 'starvation mode', so a steady income of actual real food may make it 'wake up' and chemically drive you to suddenly have a hunger like no other. It's a defencive mechanism which you may need to be aware of.
Either way, have a think about it and well done on your loss so far! It's very impressive.

Remember, never give up, but if you feel you've had enough... You can always come back to it later with a fresh mind, like I did.
