Unfortunately, due to the merchant specs that the feed was built to, it's not going to be possible for us to split it. It's currently only available in XML format as that's the most efficient way for us to carry the amount of information which the feed contains.
If that's going to cause a problem for you, feel free to drop me a line at simon@premieraffiliates.com (I'll be checking my emails over the weekend) or alternatively give me a ring on 020 7399 7357 and we can have a chat about it further.