How to download and extract zip files from url located in an xml field into one directory on web server

I have 100+ of these XML files and they don't have the images to where I can automate it. I need to be able to download "partImage" from each listing (which downloads as a .zip) extract it into a common directory, (in the process removing the zip folder as there is no rhyme or reason to the name of it) so that I can import it into our product catalog by image name which corresponds to the part number. I have seen many examples to do part of this, but not fully automate which is necessary. Thanks!

<part>
  <partNumber>37040152</partNumber> 
  <punctuatedPartNumber>3704-0152</punctuatedPartNumber> 
  <partStatusDescr>Standard</partStatusDescr> 
  <partDescr>CLEANER WASH DEGREASE GL</partDescr> 
  <uom>EA</uom> 
  <brandName>1.7</brandName> 
  <supplierNumber>CS-1G</supplierNumber> 
  <baseDealerPrice>****.****</baseDealerPrice> 
  <yourDealerPrice>****.****</yourDealerPrice> 
  <retailPrice>****.****</retailPrice> 
  <originalRetailPrice>****.****</originalRetailPrice> 
  <partImage>http://ift.tt/1KpWraT; 
  <productId>222779</productId> 
  <productName>FORMULA-1 WASH DEGREASER CONCENTRATE</productName> 
  <productImage>http://ift.tt/1AqDjcx; 
  <bullet1>Cuts through the toughest grime and dirt</bullet1> 
  <bullet2>Leaves the bike clean and like new</bullet2> 
  <bullet3>16 fl. oz. bottles, 12 per case; gallon jugs, 4 per case; sold each</bullet3> 
</part>