BSI Upgradation from 7.0 to 8.0

Team,

I searched notes 1022656 and clearly given that with in 31 st of december 2007 we need to update 8.0 over 7.0 but it is not mentioned that how long it will take to Upgrade.We are having 55 days nearly, is this time frame is enough.

Just now i joind in project and i am a fresher.I am blank about this.