well i was getting worried when i booked the test for my wife and stepson, becuase i didnt really see them reading much, with less than a week to go i started moaning, and thats when i started seeing them swatting, i'am not sure what level of english your wife is at, my wife is excellent - she had to reach ielts with an average of 7 (english tests in listening, reading and writing, before she could take medical board exams here, but my stepson can read english good, but finds it difficult sometimes to know the right word to say in english.

i think a couple of hours a day for a month should be enough for most, buy some test software off ebay or one of the living in uk sites, so your wife gets use to sitting at the pc and answering questions, so it will test her on what shes already studied, i think this was just as important as reading the chapters and makes a change from reading all them facts

i wanted them to pass the test before the end of march, as iam applying for ILR for them in mid april, so i booked it for 16th of march, and if they failed i was ready to book them in on the 23rd and even the 30th but they both passed first time

good luck to her