^^ that actually just removes the shorcuts and icons. You cant actually remove IE.
Also I use FTP quite a bit too but i find most standalone clients offer better functionality thand any brower i have seen doing ftp.
Start -> Settings -> Control Panel -> Administrative Tools -> Computer Management -> select disk management from the left pane. This will show you all the partitions on your drives. The two FAT partitions are the diagnostic and restore partitions that dell has placed there for you.
^^^ As Freak4Dell said you cant completely get rid of explorer, XP is heavily based on it. All you can do is get rid of the icons and shortcuts. But even then you will always be able to run it by typing in iexplore in the run window.