Normally the Blue Screen of Death almost always means a hardware failure. Most commonly it is due to bad RAM. But, sometimes it can be from your system overheating (especially if overclocked or in an area that doesn't breath well like a cabinet), or even from a hard drive that is starting to fail. Normally though, if your hardware is starting to fail, you will eventually start seeing the problem happen when running other programs. If it was overheating, running CPU intensive games like Oblivion at high settings for extended amount of times, it should cause the problem as well. If it is RAM related, you need something that is a RAM hog to test it, or just download a program to check your ram like mem86 or something. Even though EQ is pretty old, it can still eat up alot of RAM depending on your settings. And if you run multiple sessions at once, it is sure to really use up all of your system resources quickly. If you have file paging disabled, your 1GB of RAM could easily be getting filled with EQ and then crashing your system when there is no more memory available. If the problem is your hard drive, then maybe try uninstalling Titanium completely and deleting the directory, then do a defrag on your hard drive and install the game again and see what happens. But, if you have a sector on your hard drive that is currently bad, it is only a matter of time before the whole thing goes bye bye completely.
Just a few things to consider if it might be related to your hardware
Of course, it could still be something else, but from my own experience, BSoD is pretty rarely caused by an actual program in XP.