Backup your SD card then try reformatting the card in a digicam or something as PCs dont format it properly if you're using Windows (you have to use Panasonic SD formatter for example instead).
Then copy all your files back on. The Bootmii folder is only 239K anyway.
If I stick a 1TB hdd in a caddy will my jtagged xbox NXE see the drive or would only homebrew like Freestyle Dash/Xexmenu see it? Sorry silly question I only recently jtagged it.
Edit: I mean the Dealextreme plug on type caddy.
This one
Here's one on ebay that just went for £97+11 postage.
Another one £54+14 postage with dodgy cd tray, 20gb hdd
Maybe £50 for console only no accessories or games?
The £20-50 price tag is for consoles only with RROD.