Changing the paper size of a printer

[Gigatech]

Hi,

In W98, to change the paper size of a printer I just go to the printer properties dialog and modify the paper size to "custom" and set the values.

In Windows 2000 I go to the Edit Menu ->Server Properties and create New Form.

I can assign this new size to some printer models (like Epson LX300+), but I can´t assign this form to other printers (like Epson LX810)

Any help?