I have done exactly this, recently, You will likely end up needing an inspection (NOT a Vehicle Identity Check - these are done by VOSA) at your local DVLA office. VIC are for eg. re-registering a written off vehicle or imports etc... You don't need an IVA check.
The inspection requires 1 form filling in, proof of purchase eg your chassis receipt, and 15 minutes of your time.
I too am getting fed up of the apparent constant battle between the 'head in the sand, I don't need to follow the rules, it'll never happen to me' brigade vs the 'over the top IVA police / anal brigade'
The rules are freely available on the internet and easy to understand, failing that there are several DVLA local offices around / VOSA helpline or DfT website. Whether people follow the rules or not is up to them, I personally am not going to start telling people what they should or shouldnt do.
I agree with Les there are far too many people spouting cr@p without actually checking themselves. I feel relatively confident to give advice as I personally went through the whole process 10 months ago.
My sincere apologies to the original poster for ranting on his thread!
Mike