Hi again.
Well, it is recomended that you use the same User name as your instance name. It will save you problems latter...
We answered "YES" to all the add-ons DB2 offerd us, expept from "OLAP" (since you realy don't need it for TEC).
We only changed 3 things:
1) Installation directory: c:\DB2\SQLLIB (and not "Program files" - we don't like subdirs with space in the name)
2) User name : the same as the database name ("DB2" in our case)
3) user password: tectec (just so we won't have to change the rim's password)