Reformatting 160gb Maxtor HDD

[BitStream]

I have an Xecuter 2.3 Lite Plus installed in my xbox with bios 4979.67 installed. I replaced the hard drive with a Maxtor 160gb one but I didn't flash the bios with the 4979.06 bios before formatting the drive (I know, what a numpty). I now have an extended drive with partition G tagged on the end. I have since flashed the bios with 4979.06 and tried reformatting the drive but I keep getting partitions F and G. I want to get rid of the G partition and extend the F one to it's maximum. Whatever I try doesn't seem to work. Any suggestions guys as it's driving me nuts.