Jignesh,

Setting custom paper sizes in XP is different from Win98/ME.

You may do the ff:

1. Go to Start/Settings/Printers and Faxes
2. in the Printers and Faxes windows, select File and then Server Properties
3. go to Forms page, then check Create a New Form checkbox
4. enter desired name in the Form Name textbox
5. enter desired Width, Height and whether it is in Metric or English
6. then, click on Save Form button
7. voila! your custom form is saved and available for all installed printers!

Hope to help,
Dennis