PCKS#2 certificate installing into Outlook

[Lawrence Voon]

Dear all,

I have had exported and saved in file of my certificates
for email in PCKS#2 format.

Following after I reformated to Windows XP and imported
the certificates into Internet Options-Internet Explorer-
Content as viewed successfully placed.

But in Outlook Express the certicicates are not seen nor
able to digital sign. How do I get the certificates into
Outlook Express to use?

Appreciate your input.
Regards,
Lawrence Voon