If you do get the loan, the lender isn't going to care where the money comes from. You can certainly have him pay you, and you'd send one check in to the lender.
You are faced with two important issues: Financial and legal.........
Our recommendation is to consult with several mortgage people to get their input on the financial aspect of this sinerio. In an effort to protect the interests of everyone involved it is also important to speak with an attorney that can make recommendations on how you should proceed safely.
Your best bet would be to consult with a mortgage professional as far as being "gifted" money for a down payment. It can be done. You may wany to consider taking a "loan" from you parents rather than a "gift". You may be better off as a first time homeowner, (if you haven't purchased a home yet) and take advantage of the 8k tax credit which you don't have to pay back as long as you live in the property for at least 3 years.
You would need to speak to your mortgage person to see how much your parents are allowed to "Gift", but certainely that can be done. If you or your parents want everyting in your name then your boyfriend nor his income nor his contributing part of the monthly mortgage would be taken into account. Pretty much everything would be in Your Name only. Make sure that you and you alone can afford everything is going to be in your name.
I would be happy to talk to you and assist you. I'm in the New Haven area. Good Luck!
Of course, keep in mind that if you can not qualify for the mortgage loan on your own, and you need the income of your boyfreind to afford the condo mortgage payments, then you probably would need to consider applying for the loan together or with your parents.
If you need any further info, feel free to contact me.