oh its simple actually
take a look at this example:
// the Text
char *Text = "Hello";
dbCreateBitmap(/*not zero*/ 1);
dbCLS() // Clear the screen with no color meaning Alpha
// use dbInk() , dbTextSize(), and such as you like
dbText(0,0,Text);
dbGetImage(Image,0,0,dbTextWidth(Text)+5,dbTextHeight(Text)+5);
dbMakeObjectPlain(ObjectID,SizeX,SizeY);
dbTextureObject(ObjectID,FreeImage);
dbSetObject(bla bla , just make it so it will Cull it and will use Alpha); //actually i dont remmber if the Alpha channel setting is in here , but you will find it in the document(refrence).
///////////
then inside the main loop
dbRotateObject(ObjectID,dbCameraPositionX(),dbCameraPositionY(),dbCameraPositionZ());
//this should work without a problem , its working for me
what happens , is you have a plain that actually act like a sprite , you always see it in the same way such as a sprite cause it will always face your position.
hope this can help.