How to add custom field into PKI request

Hello,

I have a question concerning our PKI infrastructure.

Can I add to our stand alone CA custom field.

I mean if somebody enter web site htp://OURCa/certsrv/---> "Web Browser Certificate" or "Advanced certificate request" --> and is there any way to add a new fileld on example "Application Usage" where user can enter some text ?

Example beneath:

To complete your certificate, type the requested information in the following boxes.

Name:
E-Mail:
Company:
Department:
City:
State:
Country/Region:
Application Usage: SOME TEXT

I'll be very thankful for any help.

Mac