DescentBB

I hope this is the right place to post this.I have the Dimensions disc and the LOTW disc.I like the way the LOTW starts with being able to select what map you want to play,except that a !Contest selection doesn't show up in the Rebirth mission selector,and with Dimensions it doesn't show as a selectable mission either.What I would like to know is how to make each one of these packs a selectable mission,like Descend Again or Vignettes.Is it something that would be hard to do? Or would it be easy? I have no idea and that's why I'm turning to you guys for help.Does it have something to do with putting everything in a hog file? If someone could do this for me,or point me to a method of doing it myself,I would appreciate it.I was also wondering if there is an app to choose maps or missions on your hard drive and then run them?