erm...no I've done it with over 30 lines. Did you read how to use it? The number is how many lines there are to be displayed, then there should be an empty line, and then your credits so the .dat file would look like.
30
line #1
line #2
line #3
line #4
line #5
line #6
line #7
line #8
line #9
line #10
line #11
line #12
line #13
line #14
line #15
line #16
line #17
line #18
line #19
line #20
line #21
line #22
line #23
line #24
line #25
line #26
line #27
line #28
line #29
line #30
"Watson you idiot! Someone stole our tent!"