I might add that, if the distributions of students between bands in each course are significantly different to last year's distributions, LazSeeker might not be all that accurate for 2002.
It seems that the general opinion is that the 2002 HSC exams have been easier than the 2001 HSC exams. I couldn't say for sure whether this is the case or not, but if it is, and you're trying to predict your UAI for this year (which we don't claim to be able to do), LazSeeker will likely report something that is slightly too high.
In reality, the UAI is calculated from scaled raw marks. No info is released about these raw marks, so LazSeeker cheats and skips that step, instead calculating the scaled mark directly from the aligned mark that the Board reports. The difficulty of exams and so on does not affect the actual scaling processes, but it could cause a few discrepancies with regard to LazSeeker, as it uses aligned HSC marks.
And to reiterate what Christine said... it's only an estimate anyway.