Debt Reduction - is it forgiving?

First of all I would like to thank everyone on this website because last year you gave me the strength (& knowledge) to put my boyfriend's collection agency in their place. It was somewhat of a happy ending with him being able to pay what he could afford every month on top of his other 2 loans. So, now 1 year later he's still doing good with payments (except for a NSF for one of his post-dated cheques around Xmas-time) on his CSL, NS loan and RBC Student Line of Credit. The fact that the government takes his income tax return to pay off the debt too is a blessing in disguise.

Now, I was browsing through your posts and noticed that he could be eligible for Debt Reduction Repayment which would obviously really help him out. However I'm not sure if he'd be entirely eligible because its only since we've been together (1 year) that he's started to take control of his debt and not hide from it.

Brief history on his debt:
1. CSL approx. $7000 which the Crown has Allied International Credit collecting from him because he stopped paying until they caught up with him. According to them though, it is still owed to the Crown.
2. NS student loan approx. $6000
3. RBC student line of credit approx. $6500
4. He's paying $350/month from a $900 monthly salary.

Now, my questions are:

1. Although he defaulted on his CSL before and now its at a collection agency, could he still be eligible for Debt Reduction because I think he's exhausted Interest Relief already and he's been really good with payments for the past year? I think its also close to 5 years since he graduated.

2. What exactly is debt consolidation? Do you think that could make his monthly payments less than now?

3. What exactly does CSL in default mean - in terms of credit score etc.

Once again, thanks for all your help. Sorry that my info is not entirely exact, I didn't want to mention this DRR possibility to him cause I don't want to get his hopes up. He's really been trying hard to keep up with loan payments eventhough he doesn't have much left afterwards.

Thanks for the input Nago - hopefully Johnny can help with some of my other questions too :-)