File Creation on Desktop rather than in Installation Folder

The installer created by IzPack works perfectly fine. It created the shortcuts on Desktop, Start and Start-> Programs. These shortcuts when clicked also work fine. It calls the executable Jar file located in the Installed Folder.

First Issue, when I click the shortcut created on the Desktop, my application creates files.
Now these files are meant to be created in the Installation folder. But with IzPack these files are being created on the Desktop.

Second Issue, when I click the shortcut created on Start-> Programs, the files created by my application are created in the C:\Documents and Settings\admin\ folder and not in the Installation folder.