Good luck! I made a nano1 EP back in december and it's -pretty- good so I'm trying to get back to that level with nano2 since I really REALLY want it

I got everything figured out. Below, I will detail my process, for anyone else who may find themselves with the same problem in the future. It may be also worth noting that I could not get my green USB - MIDI adaptor to work at all. Was there something wrong with these products? Or is just because of the weird alignment for the link cable end? Anyways, here are the steps I took to update my cartridge.

put rom in folder downloaded from nanoloop website
open terminal
ran command: cd <folder location / name >
---- You can drag the folder in the terminal instead of typing out the location / name ----
turn on gameboy while holding select until the rhombus boot screen appears
connect nlmidi connector to usb port and link cable
insert link cable in Gameboy
run the command: ./nlmidi02 -send <rom name>.gb
---- I found ./nlmidi02 in the readme.txt file found in the download from the nanoloop website. This may change in the future ----
hold select and press start on the gameboy
an "n" should appear under the rhombus
on the computer, hit "enter" to start the transfer
nlmidi in the command line should count up to 64/64k
when nlmidi says "done" hit start on the gameboy

Thanks to everyone for helping me figure this out. Hopefully this can help someone else out in the future.
Now I actually have to get good at Nanoloop.

You have to make sure to use the exact name of the nlmidi program in your command line.  I think last time I ran it the version was "nlmidi04".  Just look in the unzipped folder and find the appropriate file name.

Ok BitFlourish, I greatly appreciate your step by step, but it did not work for me. I will type out the steps I did in order to show where it stopped working for me. I am going to type out every little thing I did, just to really be clear as what I tried to do. Here is what I did:

put rom in folder
***added step*** opened terminal
***added step*** ran command: cd <folder location / name >
turn on gameboy while holding select until the rhombus boot screen appears
connect nlmidi connector to usb port and link cable
insert link cable in
run the command: nlmidi -send <rom name>.gb

at this point the terminal window returns this:

-bash: nlmidi: command not found

Is there something I need to do to get the system to recognize the command? I do get the n to appear, so I think my gameboy is all ready to

I will try that as soon as I get home from work. Thanks for all the help; I really appreciate it!

put rom in folder
turn on gameboy while holding select until the rhombus boot screen appears
connect nlmidi connector to usb port and link cable
insert link cable in
run the command: nlmidi -send <rom name>.gb
hold select and press start on the gameboy
an "n" should appear under the rhombus
on the computer, hit "enter" to start the transfer
nlmidi in the command line should count up to 64/64k
when nlmidi says "done" hit start on the gameboy

is that good enough?

okay. use the red one. download the nanoloop midi sync software, unzip the folder. put 1.71 rom in there.

I actually own one of both

first of all, what version of usb midi adaptor do you own? is it red?

Edit after reading your post more closely.  Make sure when you type in the commands that you use exactly what's shown in the command list on the screen.  Don't just copy/paste from somewhere else.

Oliver is pretty good at getting back to you via twitter as well. https://twitter.com/nanoloop

Can you elaborate on this a bit?

you have to edit the command line in notepad (im on windows)

Ok, so I have got my new nanoloop cart working. From the e-mail oliver sends when he sends out your cart:

To start nanoloop, press the START button. When it starts for the first time, it will then display "??????" below the nanoloop logo. To continue, press START+SELECT.

I guess I just read over that. This also fixed the hello start screen.

If anyone can still help me with updating my 1.6.3 cart, that would be great! still no luck connecting it with USB - MIDI adaptor.

I had the same start up issue with my 2.5 & basically the only way to get it "booted up" is to tun it on/off till the nintendo logo pops up then your good..I know with my cart its a error i guess that some of these may have had..to cut it short, if u can't get it going I'd contact Oliver. He's the one that told me to tun it on/off & if it didn't work he would replace it.