Depends on a bunch of things. The Biro mod isn't a one-size-fits-all solution to hop arms, but that's what it's for - providing a firm nub or extension to a hop arm where there simply isn't enough material to press the hop up rubber enough. In the VSR, for example, it provides an even surface that the original arm didn't. In an AEG there are generally better ways of applying pressure. M Nubs are good for a totally nub, but then it comes down to your bucking because they're not ideal for conventional ones and can require the hop lever to be modified so they stay flat. Equally the Biro mod isn't ideal on standard nubs as a lot of the medium and softer ones are designed to flex slightly when in contact with the BB (indeed they all are).
Yes, it can be any ballpoint. The bit you want is about the top few centimetres of the plastic cylinder that holds the ink (take it from the very top or you'll end up pretty messy). You then cut this down to suit your hop unit.
I guess the quick answer to your question would be 'no' - the Bic mod alone won't improve your range.
I think I saw you post in that thread with the other guy who had range problems before. First off, take the advice in that thread we gave to the other guy if you can and get yourself on .25s ASAP if you've not already. Secondly, check your hop bucking is clean from any silicone and not torn. Thirdly, look down the inner barrel when you have it removed and check the rubber is actually protruding as it should. Remember, you want to be able to place a BB in there and have it stay even when the barrel is pointing down. If it's not even at that stage you are dramatically underhopping.
From there it's just a case of fine tuning. Go early to a game, set up a target and dial in the hop. If your FPS is consistent and around 320-350, then the only thing that can be affecting your trajectory is either the weight of the BB, the amount of backspin it's getting from the hop and the condition of the barrel. Assuming your barrel isn't completely bent, you should be getting at least 40m with even the most half-arsed hop adjustments.