--biff-get X could/should check baldur.ini

I was just trying to export some .tis, .wed, and .mos files using --biff-get, but wound up with an error that it couldn't find AREA030A.BIF in bg2\data\. Since I have a full install, it's in BG2\CD2\data. Can you easily add a feature to WeiDU to check this? If not, no big deal, but it'd be somewhat useful.