Go to your profile and set up a user alias in the 'define alias' box. You can then switch between your prime username and any alias you set up by clicking on the 'button' next to that alias and saving your settings.
If you hover over my username <<< (iano) you'll see a list of my aliases (in this case but 1) pop up. I don't think you can change your prime username though (so LindaLou will always pop up when someone hovers over you <<)
Edited by iano, : No reason given.
Edited by iano, : No reason given.