Just relax and don't panic when you talk to an officer. Meaning that dont have the attitude of "oh my god what should i do"...
Don't tell the truth. In other words, you dont have to lie but you need to twist your words enough. Tell them the 1800 number told you do this. Tell them that they said this and act dumb. Honestly the dorks at the mis-information line lie to us all the time and misinform us. Do what you think will get you your new bio.
If the officer says, Well wait for another 10 years..Tell them the great people on the 1800 line(by the way they are so helpful), they told me to make an infopass and they will schedule my bio....and say "Are they wrong?, i am confused?"....Or make an excuse as Nas said, Say, I have a wedding to attend in Canada and i called the info line and they told me that infopass people can get me my bio and also my temp card.
THe whole point is you need to act like a dumb immigrant. You can't act as if you know it all. When they didn't do my bio early, I went and acted dumb and made up things and I got my bio done earlier.
Best of luck. Just remember act dumb but make sure you make your points. With these government employees, they always have to "make the decision" so you cant tell them that they should do the BIO..if they tell u then only it works..
Best of luck.