I think the Neocate burps are the worst!!  Ha ha.... eeew. 

OK, my little Neocate booklet from Nutricia states:
"I have just started my baby on Neocate at my doctor or dietitian's recommendation and am having difficulty getting my baby to take it.  What should I do?

Try feeding the Neocate formula when your child is really hungry.  If weaning from breastfeeding, have someone other then mum offer the feed initially.

Try adding a small amount of golden syrup, pure vanilla essence or brown sugar. - Approximately 1tsp golden syrup, or 1-2 drops pure vanilla essence, or 1/2 tsp brown sugar to 240mls of Neocate formula.  This should only be done until the child is established on the formula (usually 2-3 days).  Check with your doctor/dietitian before doing this.  Once the child is taking the Neocate gradually decrease, then stopp adding them.  Golden syrup and brown sugar can be harmful to teeth so use it only for a few days and never in bottles given before bedtime.  Do not add other flavourings to the Neocate.  These are unsuitable for children with severe food allergies. 

Try adding a small amount of Neocate formula to the formula previously tolerated by your child, eg, 1/4 Neocate to 3/4 previous formula and then gradually increase the amount of Neocate and decreast the amount of the other formula.  Ideally, try and do this over 3-4 days.  Check with your doctor/dietitian before doing this.".