Custom Request Forms for different Categories

Hi, We are considering using Service Desk for a multi-site implementation; two in the UK and one in Romania.

During my evaluation process demo's with users and key stake-holders; the re-occuring feedback I have received is this;

Can we have different custom fields (there's a max of six currently) appearing in the Request Form depending on which Category (e.g. Printers, Internet) is chosen in the drop-down menu? Some of our categories are quite specialist (e.g. source code promotion requests, server reboots) and appear confusing to End User Service Desk Portal users whom are logging a problem with their desktop PC.

Thanks, Richard.