Installing a woodburner

At present our house is heated by a central heating system powered by a LPG boiler. This can also be used to heat the hot water tank.
We are planning a remodelling of the lounge and I have in mind to take the opportunity to install a woodburner with a built in backboiler. The room has a chimney already.
What would be involved in linking the backboiler into the existing system? Underfloor access isn't a problem.
I know this isn't exactly a DIY project [for me anyway!] but I'd be glad to hear if anyone has any experiences or pointers.
Thanks in advance.
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