Sorry it took so long to get back to you. Unfortunately someone discovered how to enable encryption on their WIFI so I can't connect at home anymore. At any rate, you've already figured out the method I was going to recommend. It's possible to complete that transfer, but it would require that you perform the insert burn by hand. That's a VERY difficult burn to do by hand in this case, even the stock Prograde and Retrograde AP's aren't much use. Figuring out the correct orientation and where to start the burn would require a fair amount of practice and skill.
For the future, I'm going to explain a few things. Some of this you probably already know, but it's easier to explain this if I start at the beginning. Please don't feel I'm "talking down" to you if I explain the obvious (and other readers may not know some of it).
Jupiter is HUGE!!!! If we don't count the Sun itself, Jupiter has more mass than the rest of the solar system combined. It's extremely high gravity "compresses" the SOI's of it's moons. Europa would have a much larger SOI if it orbited any other planet.
When you transfer from an orbit that is much lower (or higher) than the target, you will have a large Relative Velocity when you reach the target. Combined with the smallness of the moon's SOI, this means you will pass through the moon's SOI quite quickly - in this case you would only be inside Europa's SOI for about a minute, maybe less.
The high Relative Velocity also means you will have a rather long insertion burn. In this case, your insertion dV was about 7km/s. That's a burn time of almost 14 minutes in a fully fueled DGIV with the default engines. It's close to 10 minutes even with the higher thrust engines.
Raising your orbit to 100M helped you in two ways. First, since you now have a much lower Relative Velocity, it will take longer to pass though Europa's SOI, which gives you more time for the insert burn. The lower RVel also means a lower dV is required for the insert, so the burn is much shorter. So you now have a much shorter burn, and a longer "window" in which to make that burn.
To help predict this in the future, the main clue will be the Cir value shown in Map. This value represents an estimate of how much dV will be needed to successfully insert into the target orbit. Keep in mind that this is an estimate, and will tend to be low at first. On this particular transfer, the Cir was estimated at a bit under 6km/s when you planned the transfer, and was a bit over 7km/s by the time you reached Europa.
Burn Time Calculator MFD is a very helpful tool for this, and many other, situations. It even will tell you how far you will travel during the burn (can be used to time braking burns when landing on airless bodies):
[ame="http://www.orbithangar.com/searchid.php?ID=4530"]Burn Time Calculator 2.0[/ame]
I believe BTC assumes limited fuel (and therefore mass reduction during the burn) so it won't be quite accurate if you have "Unlimited Fuel" enabled.
I'm sure there's math that will determine how long it will take you to pass through an SOI, but I'm not good at math. I've had enough practice that I've developed a "feel" for what will work and what won't. I make an educated guess at how long it will take to pass through, and ensure the burntime for insert is less. Orbit Insert uses a two body solution, and is reliably accurate only if you are inside the target's SOI before the burn starts.
