QUOTE(Eric and An Thuy @ Jan 8 2008, 05:37 AM)

I think that you should get engaged first that is the way of Vietnam Custom I sent in many photos of our engagement thats just my thoughts
I'm with Eric!
You know you will marry this girl, then an Engagement is expected culturally and "legally" helpful in your Visa journey with HCMC.
I understand you have your reason why not have the engagement ASAP but wait until July 08. However, these days HCMC will 99.99999% want to see your Engagement ceremony pictures/video/evidence of some sort as part of their Visa Review/Approval process.
Yes, you can apply right now based on the fact that you two have met within the past 2 years from the day you apply. After you start your application, before the scheduled interview date, hopefully you should have already had the engagement ceremony.
Keep in mind, all the Guides and FAO's above are recommended if not required reads for everyone who visits VJ or plan to apply for someone to enter the US via K-1/K-3/CR-1 Visa. However, each Consulate is different, ESPECIALLY "HCMC"
Prepare yourself for an emotional ride that you've never seen before

Come back often on VJ for Q&A. There is no dumb question, just stupid answers! (ME, guilty!)
Good luck and I think you should start gathering the evidence to support your Petition ASAP. Good luck!