Kruser -
I use Quicken 2000 almost daily on both OS 9.1 (QT 5 Pro) and 8.6 (QT 4.1.2), and I can't find QuickTimeLib on either of those systems.
I suspect it's a Quicken anomaly and that it's one of those error msgs that's wrong (there IS some problem that's keeping Quicken from launching, but the absence of 'QuickTimeLib' is NOT the problem).
I suggest, in this order:
* restart with the 'OS All' extension set
* check carefully to see whether all your QuickTime extensions are of the same version - trash 'em all and re-install QT if they're not
* remove the Quicken preferences from the preferences folder and let Quicken create a new one
* re-install Quicken
hope this helps,
- kbeartx