At this point there's not much to worry about unless you have pips in other eggs. Most problems with assisting happen when people assist before they are ready to come out, usually when they've pipped and not made any progress in awhile. However this little guy is ready and trying to come out, but it sounds like he didn't zip all the way, or didn't zip in a clean line and is having trouble pushing off the top. The longer you wait the harder it will be for the little one to recover, just something to consider.
If you are worried about any other pipped eggs, you can do the steamy bathroom trick, or you can raise the humidity shortly before you open the bator by sticking in a wet paper towel via a vent hole, or you can just toss in a moist sponge when you take out the egg. I have never had trouble with shrink wrapping and I have had a few that had problems zipping. Most of the time I just reach in and gently peel the cap off enough to where all the chick has to do is give one big push to come out. Very fast.
In fact, here's a video of one of my eggs that I needed to assist. He was stuck in an odd position, and this is how I helped him: I assist him around 27:00
http://www.ustream.tv/recorded/29891623
. And they all had saddle air cells. Everybody has a system that works for them. And even when you think you got it down. S**t still happens. Enjoy your 8 little blessing. 
