I'm sorry to hear about your daughters skin condition, although I haven't treated moluscum in the past I do know that borage oil/cream has helped in a variety of serious skin complaints, so I am sure it is worth a try.
if you are going to try it please use only 100% borage oil and a cream with a high percentage of the oil in it!
I don't know where you are based, but if it is usefull to you, you can take a look at my website http://www.rosielaing.co.uk and see if it is of any use.