Reading the old posts , i see i have first to install into the empeg a builder-image in order to format and prepare the HD. Where i can donload this "utility" ?

You should not be reading old BBS posts to figure out how to install the hard disk.

Instead, you should be carefully following the step-by-step instructions located here. Among those instructions is a link to the utility you need. Do not attempt to upgrade your hard disk without carefully reading the instructions top to bottom.