Assuming you know how to connect the new hard drives interface and power connections...once you have it recognized by your system I would HIGHLY recommend Acronis Migrate Easy. 

Here is a place to start for installing your new HD: http://support.dell.com/support/edocs/systems/xps410/en/SM_EN/parts.htm#wp1410709

You will want to connect your new drive to SATA1 connector and power.  You shouldn't need to screw it in, just plug it in and do your drive copy (below), and THEN take out the existing HD and replace with the new HD. 

http://www.acronis.com/homecomputing/products/migrateeasy/

It will be the best $40 you've ever spent! 

Hi gary125, Your manual HERE will help you install your hard drive, along with this information here, Install your old hard drive as a secondary drive and you can use this FREE Acronis True Image WD Edition Software HERE to copy across your partitions etc.

To all, be advised that the FREE Acronis True Image Western Digital (WD) edition software will only work with WD hard drives. 

Also, while True Image can copy partitions and files within, it won't make the new HD bootable.  That's where Acronis Migrate Easy comes in. 

Seagate/Maxtor also, have their own version of Acronis TI, that can used, same WDC, only on their hard drives and the cloned hard drive created, is bootable.   :emotion-5:

Bev.

Hi Zantac, I dont know where you get your information from, but I have it on my 500Gb Seagate drive, and it works OK.

To all, be advised that the FREE Acronis True Image Western Digital (WD) edition software will only work with WD hard drives.  Also, while True Image can copy partitions and files within, it won't make the new HD bootable.  That's where Acronis Migrate Easy comes in.

 Zantac.

To add to my previous post, I've been using the retail versions of Acronis True Image for several years on Vista and XP systems and every imaged hard drive created has been bootable.    :emotion-5: 

Bev.