I have few questions regarding Upgrades. We are currently doing NW2004s upgrade and my management also wants to do SEM upgrade simultaneously, if possible because they want to go with BCS. Before we starting anything with SEM upgrade I want to know
 If there is any interdependencies between these two upgrades?
 If so what are they or can we start simultaneously?
 Does SEM & BI sit in different serves or its the same server but we maintain 2 different instances?
 How does this mechanism work?
Can anyone send me any links or documents related to this? And thanks in advance,