update online entry system

we have an existing online entry system which needs a few alterations. [login to view URL] changes required change entry details First name Surname Address City Postcode phone number (can it accept spaces) email address number of other riders to enter accept termas and conditions need to be able to view terms and conditions need to be able to send an email to all entrants or individual entrant at the moment one of these is not working. Also need to add an attachment to emails. this is not working on booking confirmation an email with details and an attachment needs to be sent to an entrant. Need to choose which attachment and details will be sent to each entrant. It will be different for each race and not generic at the moment anyone who enters gets added to the the list. I dont want them entered until they have payed when entering can we miss out the order id page and go directly to the secpay page for payment. At the moment people are getting to the first page and think they have entered and have not paid anyone who enters and does not pay should not be added to the riders list and should not be able to accept emails. need to be able to delete races after the event. At the moment it wont do it because the list contains riders. on the confirmation secpay order that we recieve can we have all of the entrants details