Poser itself is not a modeling program- but a broom is relitivly simple- a little creative use of primatives might do it :) when you've made the broom to your likes- export as wavefront obj the reimport it- it will be all welded together as one item :) As far as poses go- yup- pose your character then in the Pose libary click the (+) sign and it will be saved to the libary.