Minor problems

Hi, I have been using Ubuntu 12.04 with xfce/xubuntu as long as there was no trinity repository available. Now that I have updated to the trinity desktop, there seem to be some problems that I can't figure out. Firstly, I want single-click activation on the desktop and in the file manager, but can't find the place where to configure this. Then, I am missing the Sleep and Hibernate buttons on logout. Both of the mentioned items have been working ok on my previous setup with kubuntu-trinity 10.10. Anybody have some hints how to rectify this? Thanks, Mike