how long does it take to set up a co part bidding account to enable you to bid over the internet?

Can you do it in any of their offices or does it all have to go through the main one?

also i have noticed the car in the sale listed on the location and also the internet bidding... if you win on the internet does it then pull the car from the normal sale or does the normal sale then carry on with the bidding and see if your bid was more than the sale bid?

there is a car ending on wed that i fancy a punt on but dont think i will be in time with the account some how