Quick points:
* Make sure d3drm.dll exists on your computer and is located in the c:\windows\sysWOW64 folder for 64bit vista, c:\windows\system32 folder for windows versions greater than ME and c:\windows\system for version ME/98/95.
If the d3drm.dll is not on your computer the you might start with this site that has been mentioned on these forums:
DLLDump. However I cannot vouch for it as I have never used that site. You can always search the web or look on older machines. Always use virus scanning.
I think you can put the d3drm.dll in the same folder as the DB.exe and that would work as well. If you distribute a game or app, you should probably include the d3drm.dll with that app or game and makesure it lives in the directory of the exe.
Enjoy your day.