I have a question, what is more important to you? Your credit rating or your home?
If you are in need, you really have to get over this credit rating thing. Who cares? increasing our debt is what got us (Americans) into this problem. I have been paying down and off my credit cards for months now. I pay cash or save up. I use lay away and make payments. I feel so much better.
If a loan mod will allow you to stay in your home, then the last thing you should be concerned about is your credit. Get over it, and stop doing things that are in your best interest.