Relive Our Marriage

Hi,
My wife`s birthday is approaching on 27th sep and I want to give her a special gift:
I want to take her to the church and marry her again:) as our original marrige was not with christian rituals (means no church, was a simple 4 person hindu ritual).

The problem is that I am a hindu and she is a christian and I dont know anything about church weddings and have never attended one. Only idea i have is from movies wedding crashers and my daughters wedding:)

I want to keep the affair simple. I guess I need a wedding gown (can i rent one?), wedding ring (ok i need to purchase this) and church and somebody to conduct the marriage.

Need help in figuring our the logistics and costs.
Any help is appreciated
Thanks in advance for all your help.