I really don't suggest it, it may be too advanced for you, but if you insist,Right click on your blockland icon, hit properties, then in the box that says target, add -mod editor to the existing text.
Badspot doesn't want people messing with maps then come crying to him that their maps are broke.
I don't know how to get the mission editer to work on BLI have XP on windows so how the f*ck do i get it to work?
I think that if you can't figure out how to open the ME without someone else's help, then the ME is not for you.