Uploading files and the like..

[eluser]austintbiggs[/eluser]
I've currently got a form that creates database entries for an events calendar. But what I'm struggling with is uploading the event flier. I'm needing to rename the image to the event's unique id to eliminate storing the path inside the db. My current working upload form works and also creates thumbnails fine. My only snag is renaming the image file.

Although I do have 2 other questions.

1] How do you create multiple resizes at upload?

2] Has anyone tried integrating Uploadify with CI?

Any & All help is appreciated! [: