wmp11 slisptreamer directly integrates wmp11 to your xp cd, meaning it overwrites the wmp files with new ones and also add the new wmp 11 files to the xp cd. u dont have to rely on it if u dont like it..... the addon u were talking is a svcpack/runonce addon that add full wmp11 installer to your cd which will be executed with a silent switch during the xp install process. so i guess its just your choice...... as for the order i would do it like this 1. slisptream sp3 2. add wmp 11 installer and ie7 installer to nlite.