I'm not sure how well it works in wideview but you may want to try a programme called "always on top". It's a free download available at the following link - http://www.labnol.org/software/tutorials/keep-window-always-on-top/5213/ I use it in window mode and its fine.
Can I use Euroscope as an observer? (I don't want to be a controller (yet), but would be interested in seeing the ATC operations from a controllers perspective). What files would I need for UK and where would I find them?