use latest version of nintendont. (read the first post of the official nintendont thread to get a link to latest release)
If a tutorial would tell you to use USB Flash, then it wouldn't be a "good tutorial".
a good tutorial would tell you to use an external hard drive, unless you love messing with freezes and detection problems.
What I understand you want to know how to put both wii games and gamecube games on the same device?
why would you need a guide to copy files?
for wii, use
WiiBackupManager to put the games on your drive, they will be renamed/placed correctly automatically.
for gamecube, it's easier and you can do it manually with your file explorer from your preferred operating system (windows, mac, linux, android, whatever)
gamecube games need to be in :
/games/<game name>/game.iso
but, you know what, just read nintendont guide ! everything is explained in details, I spend months to write that guide, at least people should read it instead of me rewriting the same things over and over on every thread.
I'd say "if you don't know, then it's not for you".
but if you want to know : it adds support for launching other homebrew (emulators, mediaplayers, etc.) and listing ROMs and Videos directly in the loader. it's beta, and I don't provide support (it's not my work).
just read ? you gave your own answer !
it's "version 1262"
it's not "version 1268"
it's not "version 1268 mod tab"
it's not "plugin version"
and if you are not sure it's the version you want, just download it again and overwrite your files. you'll know which one you have now.
of course they do something, or else they wouldn't exist or be used.
the arguments are used for both homebrew launching, and forwarder launching methods.
guess what they do :
IOS : select a IOS to use at launch !
usb port : Set the usb port to use at launch ! (you wouldn't have thought, right?)
mount usb : whether you want to ......wait for it..... mount the USB at launch or not !
sometime questions and answers are just obvious.
it's rare (in any program) when a setting uses an unrelated name to its purpose. a setting does what it's name imply.