many, but you can divide them in 2 categories:
got a drive modchip (xenogc or duoq)? burn a minidvd with swiss.
got a ipl replacement modchip (hyperboot, viper and qoob pro)? boot swiss from the modchip.
got an ode or modchip that works like one (gcloader, wode, wiikey fusion or wasp)? copy the swiss iso to the sdcard.
use pso exploit to boot swiss (bba needed, not recommended because is long and tedious).
use a wii or an already chipped gamecube to get one of the savefile exploits in the memory card (needs specific games).
If you go the ipl replacement modchip route:
One thing to keep in mind is that iplboot does not work with SD2SP2 so if you use that with a modchip you still need an SD Gecko.
Qoob Pro and Viper GC Extreme allows you to load Swiss into the internal storage of the Viper or Qoob respectively and that can be booted but they are not autoboot so you need to select the dol from the modchip's menu to boot Swiss.
If you go the ODE route:
Swiss can autoboot from these and use the config on the SD2SP2 so this is the only way to autoboot Swiss from power on without an SD Gecko in slot B.
Since these are not burned but are pressed discs like retail games, they read fine on the stock laser without any adjustments, but a drivechip is still needed since they lack markings like the Datel Action Replay discs that allow it to boot on a stock system.
I'm straight as well, but I like teasing @AncientBoi . I like him a lot. I don't care if someone is gay or transgender at all. all I care about is what's on the inside of a person's heart. sound like a cbs special. haha