How could I install Boot Camp drivers to my Windows partition?

I've finally figured out how to install Windows without any stray network connection errors or invalid .iso file errors, but I've run into a bit of an issue. The Windows partition doesn't have any drivers. Its' resolution is 640x320 and I don't even know if I can change that. I've downloaded the Boot Camp drivers for my machine (Late 2013 MacBook Pro 15" with Retina Display) and I'd installed the Windows-run partition with those drivers in the .iso, but somehow none of those drivers were installed.

I'd downloaded them again to my Macintosh HD partition, but I can't copy them to my Windows HD partition because of file system incompatibilities or whatever. At that point I'd decided to copy them to an NTFS flash drive, then copy them from that drive to my Windows HD partition, but I'm still not allowed to do that. I'm given the not-allowed cursor when I attempt to drag the drivers folder over. I'm pretty sure I can launch Setup.exe in Windows HD if I can figure out how to copy those files over and everything will be okay, but I can't figure out how to do that.

One last thing I'd tried (the first) was to connect to Ethernet via Thunderbolt to Ethernet adapter. This did not work and I'm assuming that's because I don't have an Ethernet driver, either. I couldn't even connect to the network.

I've never been through so much trouble just to play a game from The Sims series. Why can't they hurry to the release of a Mac version? :(

Thanks for reading.