Start over again, and use those instructions. If you are a novice to reformatting or you had never done it before, you shouldn't have tried to reformat in the first place because it is not something that you just hit a button and your computer is new...
And yes, the clean version of Windows XP will be running at 640x480 (not widescreen) and will not have wireless drivers. After installing Windows the correct way from the link above, you need to go to dell.com, look up your computer, and download drivers. Not every driver is necessary, so you will need to pick only the ones you need, and if you're not sure then I guess you will have to ask someone to hold your hand.
Also some advice, try making a coherent topic name that describes your problem. You may be wondering why not many people have helped you yet, the topic is probably the reason. You would get much more help by naming the topic something like "Two partitions after reinstalling Windows" or even just "Reformatting problems" but definitely not "Helllpp" with a million exclamation marks.