Weddingbee boards

Are there any other Japanese speakers here?  I'm trying to translate my invitations to my Catholic wedding mass for my Japanese guests.  I want the invitations to keep as much as the English meaning as possible while still being super polite and formal in Japanese.  Can anyone help?  Here's the English:

Together with their parents,
GreenEyedMoon
and
Mr. Moon
request the honour of your presence
at the Nuptial Mass to unite them
in the Sacrament of Holy Matrimony
Saturday, the fourteenth of January
two thousand and twelve
at two o'clock in the afternoon
Saint ReligiousGuy Catholic Church
123 Main Street
Addison, Texas

And here's what I've got so far in Japanese:

GreenEyedMoon
と
Mr. Moon
は聖な婚姻のサクラメントですべ合わせる
結婚式のミサをあげることになりました。
つきましては、皆様からのお励ましをいただきたく、
お忙しい中、誠に恐縮ですが、ご出席くださいますよう、ご案内申し上げます。

２０１２年１月１４日（土）
午後２時
サント　レリジャスガイ　カトリックな教会
１２３　Main Street
テキサス州のアディソン市

I'm currently missing anything about our parents, but I can't think of a good way to put them in.  I also am not certain that it feels at all natural.  Finally, I'm not sure about my translation of the Catholic stuff.  Nuptial masses weren't something I regularly talked about in Japan.  :-\

Any help would be GREATLY appreciated!

@Miss Tattoo:  No, neither of us are.  I lived in Japan for two years and am inviting several of my friends from there.  Several of them have only limited English skills, and thus the Japanese invitations.

Oh, I love bilingual invites.

I can say a few phrases and such in Japanese, but I definitely can't read it...

I found a good Japanese etiquette site online, and I'm thinking now that maybe I'll just use their template to create a very Japanese invitation, then just add it as an extra insert with the English invitation.  What do you all think? 

The problem with a direct translation of the English wording is that formal Japanese invitations are just so different.  If I were to do just traditional Japanese wording, it would read something like this:

"The snow blanketing the ground is very lovely, and it shows the change of the season. 

We hope you are all exceedingly healthy and well.

At this time, we are preparing to have a wedding ceremony.  Thus, we would like to inform you that we will hold a trifling celebration of our eternity together.  We humbly wish that, although you are very busy, you would be kind enough to bestow your presence upon us. 

Mr. Moon
GreenEyedMoon

Date: January 14 (Saturday), 2:00
Place: Saint Religiousguy Catholic Church"

I honestly don't know if it's possible to combine the English meaning and the formal Japanese wording.  So maybe I should just do both?

Thank you!  I can poke at my BFF/bridesmaid who is coming from Japan, too, if I can find her on Skype.  I'm mostly worried about getting both the meaning and the etiquette right.

@Miss Tattoo:  Formal letters in Japanese are insane.  The written language there is so totally different than the spoken language.  I like the spoken language.  It doesn't make me want to tear out my hair.

Bumping the thread just in case any Japanese speakers have appeared on the Bee.  I'm now leaning toward just putting a traditional Japanese invitation with the English one as an insert.  Here's what it would read:

見解

秋雨の候、ますます御健勝のこととお慶び申し上げます。平素は格別のお引き立てをいただき、厚く御礼申し上げます。

このたび、私たちは結婚式を挙げることになりました。つきましては、ご報告かたがた末永いおつきあいをお願いしたく心ばかりの祝宴を催したいと存じます。ご多用中誠に恐縮ではございますが
ぜひご臨席を賜りますようお願い申し上げます。                　　敬具

２０１１年１０月吉日
ミスタームーン
グリーンアイドムーン

Should I add that as an insert, or should I work on a direct translation like I posted above?  And would you please help me edit the Japanese to make sure it doesn't suck?