Here's a pretty comprehensive article on using essential oils:
(Includes how to flavor sugar.)

http://www.naturesgift.com/methods.htm

Food Grade Essential Oils:

http://pathwaysstl.com/files/Food_Grade_Essential_Oils.pdf

How to make your own floral essences:

http://healing.about.com/cs/floweressences1/ht/How_floweressnc.htm

Edible Flowers Chart:
(With Poisonous Flower Chart.)

http://homecooking.about.com/library/weekly/blflowers.htm

Petals, Syrups & Crystallized Flowers:
(Has recipes for above and more.)

http://www.bbc.co.uk/food/recipes/mostof_edibleflowers.shtml

Article on essential oils, floral essences and more:

http://www.seaofchiwellness.com/id27.htm

Misc. articles using flowers for sugar, baking, cooking and more:

http://extension.unh.edu/fhgec/docs/edflwrs.htm

http://purplehazelavender.com/cooking.html

http://www.bobvila.com/HowTo_Library/You_Can_Eat_the_Flowers-Flowers-A2116.html

How to Make Rose Water:

http://www.recipezaar.com/library/getentry.zsp?id=468

How to Make Violet Water:

http://www.gardensablaze.com/HerbViolet.htm

How to Crystallize Flowers:

http://baking-decorating-cakes.suite101.com/article.cfm/crystallized_edible_flowers

HTH

My God, you're more of an Internet Search Queen than I am!!! I am but a lowly peasant in your shadow...

Stand by me, fair krazykat_14.

(I'm retired, researching for CC keeps me off the streets and out of trouble.)

I need to be retired, time to search the Internet and make cakes... woo hoo! Sign me up!