gekkoboot VS dolaunch

Your first option with PicoBoot's original iplboot-based firmware is to rename the default ipl.dol to something like a.dol, so Swiss will only be loaded when you hold down the corresponding button. In that case if you don't hold down a button your GC will load the disc as if your console is unmodded, complete with the startup animation, but if you hold A it'll skip the intro and go directly to Swiss.

https://github.com/redolution/iplboot (runs on RPI, viper, qoob modchips)

Instead of using Swiss, you could instead put Brosexec or iplboot on the memory card. This would save you a lot of room on the memory card, as Swiss and the hacked save together take up nearly 130 blocks.

I have one but since i run https://github.com/redolution/iplboot on my Qoob, i threw away all my burned disks

Yeah, PicoBoot is just a nifty way of making iplboot the first program that runs on the GC. Using iplboot this way is similar to the older Dolaunch loader, however that doesn't support the SD2SP2.

Instead of using Swiss, you could instead put Brosexec or iplboot on the memory card. This would save you a lot of room on the memory card, as Swiss and the hacked save together take up nearly 130 blocks.