I think you can use the Serv-U to build a server ,about usage of serv-u ,see http://www.ccsoftware.ca/ftpservu/faq2.cfm
first way,if you just want to make use it in a local net,you just need to a DNS server on your computer and create a record which point domain to youself ,the you should alter others DNS,point it to your IP,but this may make others connt visit internet,it's just suit for those local net
second way,you can download a client from you DynDNS servicer,and the client can update your DynDNS Automatic once you start you computer,
after this ,you should creat a static IP point to your computer in your router,then open 20 and 21 port(in your router), then others can download what you share.
just like the uper said ,what you can use is"ftp://www.pcpro.co.il/",not "http://www.pcpro.co.il/",beacuse they point to different port and protocol