Multi Stock import

Hi all.
I have one question about xml import.
Case:
Supplier has xml with product structure

<product id=”q0000028344″ article1=”задняя ось” article2=”211010060″ price=”2320″ state=”0″ promo=”1″ old_price=”2320″>
<name value_ro=”Anvelopa 215/75 R17.5 PR16 D905 (Linglong)” value_ru=”Шина 215/75 R17.5 PR16 D905 (Linglong)”/>
<description value_ro=”” value_ru=””/>
<category parent_value_ro=”Acumulatoare” parent_value_ru=”Аккумуляторы” parent_id=”000000001″ value_ro=”Camioane” value_ru=”Грузовые” id=”000000009″/>
<brand value_ro=”” value_ru=”Ling Long” id=”000000007″/>
<characteristics>
<characteristic name_ro=”” name_ru=”Диаметр” value_ro=”” value_ru=”17.5″ id=”000000033″/>
<characteristic name_ro=”” name_ru=”Тип” value_ro=”” value_ru=”Грузовая” id=”000000035″/>
<characteristic name_ro=”” name_ru=”Ширина” value_ro=”” value_ru=”215″ id=”000000037″/>
<characteristic name_ro=”” name_ru=”Высота” value_ro=”” value_ru=”75″ id=”000000038″/>
<characteristic name_ro=”” name_ru=”Ось” value_ro=”” value_ru=”задняя” id=”000000045″/>
</characteristics>
<stoks stok1=”67″ stok2=”4″ stok3=”4″ stok4=”0″/>
</product>

question is:
How can i import this product like a variable with predefined variables
Variations:
Warehouse1 – stok1
Warehouse2 – stok2
Warehouse3 – stok3
Warehouse4 – stok4

but, i can’t change XML structure/

Thank you.