I have found several cool Star Wars galaxy maps by googling and have decided on one as my kind of official map for our campaign (its an electronic if the FFG one) but some of the others have additional planets, nebulae and sector information that I would like to transfer over. I can do this with a simple paint program but cant find a copy with hi enough resolution to make the changes. Blow it up enough to work on it and everything is a blur.

Anybody know of a really hi res map that can be downloaded and altered? You know, added worlds, hyperspace lines and such?

You might try a scan of one of the maps from the older versions of Star Wars by WOTC. I think Revised core rules had a decent one. Might have been d20 version. That was ages ago. Or just start drawing, None of it is real, and nobody is going to call you on it.