1. An ipd is a backup, a service book is something different.
What are you trying to do?
2. .jar or .jad files require the .cod files as well to be transfered to a media card to load.
Or you use .alx and .cod to load through Desktop Manager.
Try downloading games/themes etc etc from your blackberry, as this is how its supposed to be done with .jad files.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."