NWDS KM Library Objects and Upload

Experts I'm making good progress on my KM app couple questions though NWDS and the library objects.

I see in these imports in my code:

com.sapportals.wcm.repository.enum.LinkType

com.sapportals.portal.security.usermanagement.IUser

and I'm assumming that it is the type of link on the object and the user logged in

1) Where can I see the definitions of those LinkType / IUser in the portal? I can click on the class and find the jar but I can't open it.

2) I'm also trying to "Quick Par Upload" but it seems I have either a definition issue on the system or my proxy is wrong. So I get the below in my sap-plugin.log file and my user msg in NWDS is "please make sure my server is running".

I'm using my definition for the message server which is 3957 in my system information

[01.09.10 / 10:54] #ERROR LEVEL# com.sap.portal.developmentTools.ideSpecific.eclipse.wizards.sapmakepar.SAPMPWizard$1 > No Information
java.net.SocketException: Unexpected end of file from server
	at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:866)
	at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:743)
	at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:863)
	at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:743)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:629)
	at com.sap.portal.developmentTools.general.wizards.upload.DeployEngine.readResponse(DeployEngine.java:363)
	at com.sap.portal.developmentTools.general.wizards.upload.DeployEngine.uploadPar(DeployEngine.java:435)
	at com.sap.portal.developmentTools.general.wizards.upload.DeployEngine.deploy(DeployEngine.java:221)

Any help is appreciated, Mike