Dont panic, I've found allll the info I need 
Here's the low down if you need help in the future
http://manual.aspdotnetstorefront.co...-packages.aspx
Refers to "set the Xml.DumpTransform AppConfig to true", this has however changed in name to : XmlPackage.DumpTransform under the XMLPACKAGE list of appconfigs.
This now dumps files into the images folder but there was a bug in the following line causing an error when it was trying to find the folder:
Code:
xFormFile = CommonLogic.SafeMapPath(String.Format("{0}images/{1}_{2}.runtime.xsl", CommonLogic.IIF(AppLogic.IsAdminSite, "~/{0}".FormatWith(AppLogic.AdminDir()), "~/"), m_PackageName, CommonLogic.IIF(AppLogic.IsAdminSite, "admin", "store")))
add the extra / in front of images
Code:
xFormFile = CommonLogic.SafeMapPath(String.Format("{0}/images/{1}_{2}.runtime.xsl", CommonLogic.IIF(AppLogic.IsAdminSite, "~/{0}".FormatWith(AppLogic.AdminDir()), "~/"), m_PackageName, CommonLogic.IIF(AppLogic.IsAdminSite, "admin", "store")))
Regards,
Jules