Hi Lilrob,
Sorry to say I reckon that your best bet is to dump your batch. I have been told that you can never take a good wine and blend it with a poor one and end up with anything other than double the quantity of poor wine.
Don't give up on the elderberries though. Next year give it another go. Make sure you get some scales. If not soon then let Santa know that's what you're after for Christmas.
Get a hydrometer too. If you can take SG readings these will help others help you if you get any problems with your wines.
Nowadays I find that the wealth of knowledge on wine forums is indispensable. There are so many people with so much experience that you will always get a hand when you need it. Research like crazy before you start a new recipe... know your enemy!
If you decide to give the elderberries another go then visit this webpage:
http://wijnmaker.blogspot.com/2007/08/scroll-down-for-
english-version-ik-had.html
Scroll down through the Dutch and you'll find the article in English.
Luc really know's his stuff.
Good luck with your future efforts. As I said, I'd bin your batch and start something else but others may disagree. Whatever you do I wish you the best of luck with your wine making.
Cheers!
Becks.