For those who don't know, several of the cave attributes (diamonds required, cave time, and rand seed) have five numerical values in a line representing, in order, difficulty levels 1-5.
Example:
CaveTime=150 110 70 40 30 means...
You get 150 seconds on level 1, 110 on level 2, etc.
So if you want to view the caves in a BDCFF on, lets say, level 3, all you need to do is copy the file (to back up the original) and replace all the level 1 values with the level 3 values (but ONLY for the three mentioned above)
Example: (change-lines are marked *)
Name=Cave A. Intro
Description=Pick up jewels and exit before time is up
DiamondValue=10 15
*DiamondsRequired=12 12 12 12 12
*CaveTime=150 110 70 40 30
Colors=Orange Gray1 White
*RandSeed=10 11 12 13 14
RandomFill=SPACE 60 BOULDER 50 DIAMOND 9
...Should be changed to:
Name=Cave A. Intro
Description=Pick up jewels and exit before time is up
DiamondValue=10 15
*DiamondsRequired=12 12 12 12 12 (no change here
*CaveTime=70 110 70 40 30
Colors=Orange Gray1 White
*RandSeed=12 11 12 13 14
RandomFill=SPACE 60 BOULDER 50 DIAMOND 9
Fun, isn't it...