I am able to make scrolls and I was wondering that if I put a spell in a scroll (such as flamestrike) caould I enhance it with a feat such as sudden maximise? So I could use several sudden maximises in a day.
Huh...interesting query. I'd say yes, as long as you have Maximize Spell, and not Sudden Maximize. As long as you pay the increased costs for an increased spell level, I don't really see why not.
If I remember right you can use sudden metamagics to boost spells as creating scroll takes one day (ie use of the sudden feat for the day). But it will increase level as would normal version of the feat. No free lunch, sorry.
It's not possible to use sudden feat when reading scroll.