Does anyone have a ubuntu/debian guide/HOWTO for making pptpd authenticate against a freeradius server which stores users in mysql?

Its setting up the freeradius part I'm struggling with as deb/ubuntu store setup files in a different(IMHO a more sensible) way to what freeradius.org refers to. However things are not making sense to me at the moment.

Any help would be greatly appreciated.

Thanks Ric_