It is strange that you have no requirement to raise equity, yet your Supervisor retains an interest in the property! This may be the result of you having no equity at the start of the IVA, but as Carullus has already stated refer to your own IP as this is quite important and they will have detailed knowledge of your case.
In principle, if the asset was excluded, there is no reason why the sale proceeds cannot be offered to creditors by way of a settlement, but your offer will need to provide something similar to that originally accepted by creditors.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
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http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp