Hi Csiemantel,
Yes, you can call the InfoPath object model. If you're using InfoPath 2007, you probably already have the Visual Studio plugin. Anyway, the data adaptors can be created and submitted to via code. The other option would be to rewrite your Web service so it takes an XML string instead (see Qdabra's DBXL for an example of this) and then you just call the Web Service from your ASPX. That's a better solution since it's more flexible.