Spent some more times on the new PIC project and found some useful stuff:
Mike Pearce Heater project over at MicroChips webiste is more or less what I intend, atleast when it comes to writing code! So Basically I just need to compile it and build the electronics, atleast for a first version.
And looking for a C compiler I found out that nowadays HTSoft have a free version of their PIC C Compiler. And best of all, it has no limitations for the 12F629 or 12%675 which I intend to use!
And ontop of all these great news I also found out that HTSoft now have an eclipse based IDE! HI-TIDE – HI-TECH Integrated Development Environment
Now I just need to get Mike’s code to compile with the PIC C compiler using the HI-TIDE.