no sir, straight usb to pc
I've not yet cared to try and use USB, so if I may suggest a different approach, you can indeed just put the nsp on the SD card and install it using GoldLeaf. The app isn't very clear about it, but the file browser can be used to install nsp files, so you could try that. Just remember that for games bigger than 4gb you will run into problems if you are using a fat32 formatted SD card. Formatting your card to exfat will fix that. Alternatively, I believe there are nsp splitters which can split the nsp file for you, but I have no experience with that.