setup ups so the customer can input their account#

[treybraid]

my client has the store setup handling all payments manually...they reconcile the email invoice with backend invoice... i dont know if this is possible--- he has asked me if i can enable another ups option whereby the customer can put their " ups " account# in the field when they buy the product and accounts payable can process the order on the backend when they complete the transaction-- they would charge his/ her credit card for the products and ups account# for shipping...

right now their are 3 fixed price's for ups service on my website:
1) standard ground
2) standard overnight
3) international

if possible how would i go about doing this...

thanks
trey

[Leo]

I also need to do this.  If anybody has an idea on how this could best be done, please comment!  Thanks