You can't. And unless you want to spend a half hour or more complaining to a CSR to try and get the promo code reapplied, don't count on getting the discount if you re-order. On top of that, you can't just cancel one item from a pre-order. You have to cancel the whole order and lose all your promo codes. Place orders individually and make sure you have a reliable card.
That's not what I was told when I emailed Newegg's CS: My email
I would like to place a preorder on a video game using a $12 off promotion, but the credit card available to me will expire before the item ships (sometime in 2013). I will automatically receive a replacement credit card about when my current card expires, but that will not occur until after the preorder promotion has ended. If I place the preorder with the to-be-cancelled card now, will I be able to have the card used to pay for the preorder changed through Newegg Customer Service once I receive the replacement credit card?
Thank you for your help.
Thank you for contacting Newegg.
For your case, please kindly note that you can use your current credit card to pre-order and then you can call our phone center at 800-390-1119 during Monday - Friday: 05:30 AM - 05:30 PM PST to change the credit card number once you get your new credit card. Please kindly notice that the credit card information can only be changed before your order is authorized. Thank you for your understanding in advance.
If you have any further questions or concerns, please visit our FAQs page. If you still require any assistance, please feel free to reply directly to this email.
Newegg Customer Service
Now, my replacement credit card (which I now have) has the exact same number as its predecessor--the one used for the preorder--but a different CVV2 number (the security code on the back), so I'm not sure if I need to contact the number for the phone center.
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"Moreso than the good, it is the evil who must be rescued." -Shigesato Itoi
So the moral of the story is Vig is awesome; all glory to the master flipper.