Sorry Adrian, but you are missing the point. You need to work out your household and personal expenditure - ie that what you need to pay, rather than what you are paying now, and then see what is left for debt repayments. You should then compare that to the minimum contractual payments required to see if you are insolvent.
I suggest that you contact a debt management company directly, who will perhaps be able to explain this to you a little better, and take you through the steps required to calculate your disposable income.
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