Arcane Preparation( Player's Guide to Faerûn, p. 32)
You can prepare an arcane spell ahead of time just as a wizard does. When you do so, you need not take any extra time to apply metamagic feats upon casting that spell.
Ability to cast arcane spells without preparation,
Each day, you can use one or more of your spell slots to prepare spells you know. (Usually, you do this in order to apply a metamagic feat to the spell.) Thereafter, you can cast that spell as a standard action even if you apply a metamagic feat to the spell as you cast it. Preparing a spell uses a slot of the appropriate level. Once the spell is prepared, you can't use that spell slot for anything else until you cast the prepared spell.
A sorcerer or bard who applies a metamagic feat to a spell must cast it as a full-round action instead of a standard action.