Installing XP from hard disk

i reformat often and would like to know how i can install XP from the hard drive itself because i dont have a floppy and a cd drive.

unfortunately I dont have access to a desktop right now and i cant do the tutorial i just read here that looks nice and easy.

anyway i was experimenting with my laptop and accidentally deleted everything.. hahaha

so i now can start from scratch. i believe this can be done through dos? I downloaded the dos 7.1 intaller cd here, thanks to the uploader Sami.

I would really appreciate if we could build a tutorial from my problem to help also anyone in the future.

Many thanks and more power to this site.