Hi, I am/was running in the same sort of problems while running Slackware. As for the video options you just have to enter nomodeset as an extra parameter while running your distribution. This because of the fact that both your nVidia GPU and your Intel CPU have graphic capabilities which will conflict if not set up properly. As for the Network card is really hard to get it to work and still haven't found my way around it. The default network manager in the huge.s kernel of Slackware does support the wired card, but unfortunately not the wireless one, so I could use some help there as well.
I ended up finding that Linux MInt 16 MATE version, Ultimate Edition 3.8 Mate ver., and Zorin 8.1 all work "out of the box" with my Alienware 14 with no "tweeking" needed to get the video to work. As far as the wifi card goes, I was told by someone on a Linux website to replace it with one with an atheroes chipset in it, they are much more "Linux friendly", and found a used one on Ebay for $11.99 plus shipping that came out of a Dell laptop. I was also able to get the Windows driver for it from the Dell website so it work with both Zorin 8.1 and Windows 7 Ultimate on my Alienware 14.
Here's the info. on the wifi card:
DELL DW1901 -0K2GW5 802.11ABGN Wireless Wifi + Bluetooth 4.0 Two-in-one Card
and the eBay auction number: 251340132337
Put that number in the eBay search box on the main page and it will take you to the page where I bought it. I bought this back in late 2013, so this specific auction is probably expired, but it will give you all the info. on a wifi card that works well with Linux and the Alienware. There's probably another current similar auction for that model wifi card available now, and it was a breeze to change. I didn't even have to do anything to the BIOS, the Alienware accepted it after install, and I've been using it since.