different types of unit

Hi
I am playing around with this module and would like to have two differnt types of bookable unit. I want people to be able to book accommodation, but I also want them seperately to be able to book courses. I have been trying to find a way to get it to do this but have not been able to. does anyone think that there is a way around this, or do i need to use two different modules, one for the accommodation and one for the courses.
Thanks for any help
And thanks to caktux for bringing this module into D6