I always find it hit and miss when trying to image the really faint stuff in Vela.
I obtained some images from APOD by Rob Gendler and Axel Mellinger. I think they are the best available.
Here
http://antwrp.gsfc.nasa.gov/apod/ap080306.html
http://antwrp.gsfc.nasa.gov/apod/ap060519.html
I used RegiStar to superimpose the images on the Maps. The tricks to do this successfully would take another thread.
Here are larger versions of the images below.
http://d1355990.i49.quadrahosting.co..._02/gend20.jpg
http://d1355990.i49.quadrahosting.co...0_02/gen50.jpg
http://d1355990.i49.quadrahosting.co...0_02/mel50.jpg
Bert