Well, you're not really installing it. Just running the files. Here is a command line to run our stuff, but you'll need to figure out the arguments for your installation:
Code:java -classpath Elsinore.ScreenConnect.Client.jar:Elsinore.ScreenConnect.Core.jar com.elsitech.screenconnect.client.Program "ScreenConnect" "localhost" "8041" "00000000-0000-0000-0000-000000000000" "BgIAAACkAABSU0ExAAgAAAEAAQDTXYXqX9WrPrKoePAY3GIg6/TtNsauC2+wB32SzzGEK3JZ3J7ByLqaTfm3ST/E0PNnsq1LgppeSQL3JrO6X2zkmA558vBNwCF8LnaiZuNGoUoTwzWtMUCiiATkvhp71bNEFqOhgNa1u8StAcm8xyT5/9z8J0REzZYUP1h78zbjtdbUNI/Gg5fUlxDmB3lw5p9cJ98PD9PoJVlfmxw093aXTgO9kFYMDRwlsI42dL7oC8r8bl0o2Y/V/yCjbgBrm7J/NboawzzfZtemMg4l6f1G+TJ2gvhnImnDvmuhJZ2yd98/4eRPGuinXWbuFkjtqTEll/YBlyGLLb1vVKsxWhSi" "Guest" "%COMPUTERNAME%" "false"
You can figure the arguments by looking at a JNLP file launched from our java web start launcher. It's important the sessionID be all zeros however.