What kind of help do you need? Ideas? Or ways to make the background?
A. I personally either just use the real thing online... or I go into MS paint, YES MS PAINT! Use the "Zoom in" function and make very detailed stars... it takes forever, but it comes out REALLY well.
B. I'd suggest, take the image of you, and either invert the colors so you look like a force ghost, or use the "Black and White" Option, and then change it from BW to a couple shades of either red (evil) or blue, kinda give yourself a spectral look... if all else fails, cut and pasting from actual images all over the place is pretty much fool proof, if you are any good at it... (go to Google Images, they have a lot more starfields!)
Here is a sketch I did for my friend's SWRPG, they wanted a villain, so I sketched them out a villain... but I didnt want it to be like the normal Villains... so I created someone beyond vicious, who has Yoda's agility, more power then the Emperor, more hatred then Vader, and the sword finess of Count Dooku. Behold, the terror of former Jedi Apprentice Masaia... aka Dark Jedi Galadeous.
Neither Jedi nor Sith Lord, to her, the New Republic Jedi are not true Jedi. The Sith are uncivilized beasts, she despises both sides, thus she honed her powers on both sides, and uses each to her advantage. There is a 10,000,000 Republic Ditari reward on her head which no Bounty Hunter will touch as none have ever returned from trying to kill her. Her shrill war cry strikes fear into the hearts of even the bravest of Jedi, and she is able to "ghost" a hunting part down two 1/3 its original size without even being seen.
Thought you might like this... a little inspiration perhaps. Enjoy!