Change the way instruction replacement works.

[0megaD]

Currently if you want to replace instructions at index 1, 5 and 8 you need to provide an array with instructions at index 1 5 and 8.

I think it is more logical to just put the instructions in an array at index 0, 1 and 2.

It also fixes support for script files with multiple instructions. (Previously the code for multiple instructions only actually loaded 1 instruction lol)

[ioncodes]

Please add an example how the target would look like with your change.

[ioncodes]

Looks like someone was faster than me fixing the conflicts :^) Thanks! I will add you to the credits 🎉