Personally, I think you can do it for a month. Even less if you want.
I have done it with Cambridge before. A couple of weeks on the plan to lose the initial blubber and then, because my BMI was at 25, I followed the re feed program, working up the different stages.
Its not really about how long you do it for, its about how you introduce food. Even if you follow TS for months and months, you will gain weight if you don't re introduce gradually, so I don't believe time is an issue.
Anyway, in answer to your question(!), take a look at the exante website, there are allsorts of recipes and ideas on there about introducing food gradually. Some nice looking ones too!!!
Good luck!