[LD50]

Yes cash there is an element of risk to this just as theres a element of risk to crossing the road, I found this tut as NooB double O zero (never opened an xbox up before) and managed just fine within a hour,
If you still have concerns I would recomend using xplorer360 to make a back up image of your XB HDD ( you hotswap the xb hdd on to your pc whilst it is in windows, you will need 10 GB of free PC HDD space ) a back up image can cure all ills

Forrest just a thought can you "system restore" to when the image was on your PC Its a long shot as 10 GB of HDD space can be written over quite easily on a small 40GB hdd like mine but If you have a BIG hdd or if the delete was quite recent you could be in luck