Hi jgd
It could be possible for you to propose an IVA taking account of your CSA arrears payments, so long as you could service both sets of creditors from your disposable income.
You will need to make the CSA aware of your other creditors, so that they understand that all debts have to be serviced. I believe that the CSA will want you to pay in the region of £500 per month, so that will need to be taken into account alongside your other household income, to work out whether you have any disposable income left to offer to your ordinary creditors.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk