How to group Radiobuttons with NSIS

Hello,

I have an InstallOptions-Screen with the following composition:



Now I want, that I have 2 groups of RadioButtons.
So hat you can select RadioButton1 OR RadioButton2 and RadioButton3 OR RadioButton4.

How can I manage to do so ?

Bye Defcon0

Are you using the GROUP flag?

No, not yet.
How does this flag work ? I tried it several times but it didn't work right.

If I remember correctly, you would do:
RadioButton1>Group
RadioButton2
RadioButton3>Group
RadioButton4