How to Update a Baseline with Current Actuals/Progress

Dear PP'ers,

I've been involved recently at ongoing buildings project (now in 7th month of a 1.5 year contract) and when I compare the update using the Claim Digger in P6 there have been a lot of changes done by the previous planner on the updated schedule.

What's the best way (most reliable) to update the baseline using the current actuals/progress.

Thanks for the assistance,

Edniel