Creating a new infopath form instance programaticly from a Sharepoint library

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C#

SharePoint

webservice

Hello, recently I've developed a web service that, when users enter specific info on a website, it calls the web-service which then loads a from template (that is published on a sharepoint lib) from the disc (I extracted the template.xml from the xsn file), then it populates the fields in the form based on user input, and uploads the form to a form library, all done programaticly. This is now working but I'm not satisfied with the process, or I think it can be done more elegantly.

What I would like to do, is to programaticly get the template.xml from the sharepoint library(when ever the form is updated i need to replace the old xml with the new one), now there are ways of doing this using external extractors wich I cannot use. Is there a fucntion or a .net library that does this or is there a better way of doing this, couse Im not shure if this is the best approach.

BTW I can get to the xsn file in the library.

using (SPSite site = new SPSite(siteUrl)
{
    site.AllowUnsafeUpdates = true;
    using (SPWeb currWeb = site.OpenWeb())
    {
        list = currWeb.Lists[libraryName];
        SPXmlDocumentCollection collection = ContentTypes[formName].XmlDocuments;
        //do something with template
    }
}

Thanks for your answers!
B