Why on earth would you use 800x600 on a 17" monitor? Besides.... that's like.... the minimum possible resolution for WinXP, 1024x768 being the standard.... God, I run mine at 1280x1024 and I'd run it higher if I could.
Edit: Just to note, I'm not bashing, I'm genuinely curious why you would want to run your resolution so low, I can't even function on it that big.
Ubique Quo Fas et Gloria Ducunt
Alternatively, I could just light you on fire. - Me