Capturing MetaMagic enhanced spells in the memorised spell list

[BlueArcher]

Hi All

How can you represent an Empowered or Extended spell in the list of memorised spells for a Wizard??

If you use the spell chooser, it will naturally assign the spell to its default level and there seems to be no way to indicate that it has had a metamagic feat applied. For example, my Wizard wants to use Empower Spell on Scorching Ray. This would mean that the 3rd level spell would take up a 4th level slot in terms of memorised spells...

Help!