DC multiple products per 1 display import dificulties

Hello,

I have just 1 task (my problem) - import one big xml file to the cjmmerce products and products display. The first part of this task was done. Products imported and has fields like Title (in DC must be same as in display), SubTitle (model name) - this 2 field is devided field Name in XML file), description, pics... So many products has the same field Title.
And now I can't imagine, how to import nodes (products displays) from the same XML file and attach the product reference to the multiple (imported) products only by the field Title...

If somebody could to help me, I will be very grateful...