Ack, sorry, I thought you said something about passing it off to someone else if I couldn't make anything of it. My bad, I'll ask next time. X_X;
As for that, I'm going to see what happens when I set bln_w to something else in the story file itself. It is set to -1 for everything in the prologue, but I wonder if setting it to something else will change it manually (whereas -1 signifies auto-adjusting to text length). I'll play around with it a bit more before I sleep.
EDIT: Okay, changing the bln_w will forcefully set it to the width you input, but only 1 and 2 seem to work. 3 will break most balloons. I'm going to test and see if it will change the balloon size based on how many times there's a line break. Maybe that'll help.
SECOND EDIT: I was right, it'll auto-adjust the balloon height based on the number of line breaks. Going to do one more test to see if it allows for more than three lines, although I think at maximum there can be three lines per balloon.
THIRD EDIT: Nope, looks like three lines is the max. But this is good news, if worse comes to worse (I'll look at the global.srb at some point later, I have to sleep now), with line breaks and forcibly setting the bln_w field to 2, this'll allow for the maximum possible space in a balloon, so there's that.