mingle forum and phpbb forums question

[arius_bell]

i have phpbb forum on my site right now and i have just realize that the theme that i have comes with a forum called mingle forum but i was woundering if anyone knew if i could link my forum register part of the forum to my theme so that users will only have to register once since now they have to register for my website and the forum and what should i be looking for in the dashboard area if it is possible to have users register once.