Why do uninstaller and installer need same iconsize?

I would like to know what the philosopy is behind the idea that uninstaller and installer need same iconsize for a custom added icon.

IMHO this should be up to the script and installer writer which icons to include.

because the icon header is used by both installer and uninstaller (to save space) only the actual bits that make up the picture can be different

Actually, it's this way so there'll be no need to include a full blown resource editor in the installer but only in the compiler.

Yes, that part of a response I expected :-) , so it is not really a philosopy only than than that to have less code.