BSP or something to Subscribe myself fot the XI Alert System

Hi,

i have a Question. Is it possible to code a BSP or something that can do the following:

I have configured the ALRTCATDEF for XI Alerts in Message Processing. There is the Button: Fixed Recipients

I want to open an Internet Explorer Window and Open a BSP or something on the XI Machine http://XXXX:8000/sap/bc/bsp/sap/Z_subscribeXIAlters

or so...

When i open the page i want that there are two checkboxes

Subscribe and unsubscribe

When i click on Subscribe i want that the system put my userid in the table under: Fixed Recipients.. the same for unsubscribe but the other way...

is this easy to implement?

Thanks for your help.

Regards

Bjoern