Hi. I recently got my Xbox chipped and using the sites guide managed to get the backup files of some games I have onto my PC's HDD. Then I created the xISO and burnt it to a DvD-R like the guide says, but when I put it in my Xbox, using the Evo X dash it just says no disc :/ The media I'm using are Datawrite DvD-R's. Don't know if they are good or not!?. Any ideas?. Thanks.
Perhaps you should try DVD+R. If not, try different brands of media. Xboxes are different on the type of media they use.
