"from your cdrom to a selected drive in your hard disk.Generally,people selects the other drive than the main drive like c so that if you need to get rid of viruses or reinstal"
I don't know why are you mad at me,maybe because of the spellings

sorry :-|
Yeah If you need to setup win98 or winxp then you can also setup from a particular drive.For example,Steven says he can't get neither xp nor 98 to work...maybe he's overwriting his previous wps?I'm not sure but here's how to do it:
copy all the files from the folder for winxp/98 after exploring your cd and clean up the drive manually( from windows) after you have selected on which drive you will keep a backup of your operating system and from which drive you will delete/format your current operating system..(my idea is that,if Steven is REALLY having so many problems with floppy's or cd's he can try this method).Suppose,you are re-installing winxp and your current windows and its system files are in c drive.Get rid of some files from windows to recycle bin and then copy and paste all the files including setup.exe and any folder that might be needed for your setup process.Now restart your computer and take the xp boot cd out,keep pressing "f8" untill you get to see the command prompt or dos mode...remember that you must have nc5 or nortan commander for this.Open nc5 from there ( it's better if nc5 is in d drive and u are deleting windows from c drive ) , delete everything including empty directories and sub-directories ,use the " tab " key to change sides.
Good.Now open the winxp saved folder from d drive and find out "setup.exe" and run it...you will need to enter the cd key somewhere i can't remember...I think this method is better than directly overwriting everything from windows as it always keeps a backup always for you...
But if you are having problems with your cd reading,or the ability of the cd drive to read data from the disk,then I suggest that you should try another cd rom.