FWIW the care you need to take when transferring from keg to bottle depends on how long after you are planning to empty the bottle. Wedge, keep this in mind for next birthday.
Making an effective CPBF is easy, forget all the copper fittings and crap like that. You just need some taps, BEVA tube (size matters) and a rubber bung. No drilling, no soldering required.
Full details are at
brewiki: counter pressure filler
If you want the beer to keep its carbonation for an extended period, then I have found that the special cap I made is invaluable. I am pretty sure I have seen things like this at the LHBS. With this cap, you avoid the otherwise inevitable step of removing the CPBF and then capping.
Oh yes, and if I do want to cap the bottle with a plain old screw cap, I leave it for 24 hours or so after I have bottled it with the valve-cap. This way the CO2 is back in solution.