colors on subtitles. plz help!

[HaBo]

hello. i have ripped starwars 2 attack of the clones and i wanted to have perm subtitles in swedish, so i followed the guide on doom9.org and i got the subtitle to work all good and everything, except this: the colors, how do i set the subtitles to be light-grey or white with black outlines? that would be the best, most viewable. now in my rip it is lightgrey subtitles, and those are not viewable when it is light background in the movie. can anyone help me? and oh yeah, positioning the subtitle in the picture, how do i set the subtitles to be in the lower black bar? i dont get it. plz help! thnx in advance! (btw, im using gknot to convert the movie to divx 5 and im using vobsub wich is included in the program to make the subtitles.)

[HaBo]

i need to know what those 4 boxes of colors are. if one of them is the outline color.