[Enigmail] S/MIME question

[Billy O Clinton]

Under the message compose window there is a lock (S/MIME). I had two
questions about the settings found there. To encrypt the message I need
a personal certificate it tells me. How do I go about getting one of
these and ultimately do should I bother? The other option listed is to
digitally sign the message (which leads me back to the certificate
issue). I appreciate your guys help & quick replies :)}
-DGP/Billy
---------------
New user of GnuPG 1.4.8 under Leopard 10.5.2. Using Thunderbird 2.0 and
Enigmail. Who knew Slick Willy was using encryption! Monica wished I
would have learned sooner!
--------------

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: Billy O Clinton billyoclintonpgp at gmail.com (0x5B59B060)	pub.asc
Url: http://www.mozdev.org/pipermail/enigmail/attachments/20080311/5e97bf1f/attachment.ksh 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 257 bytes
Desc: OpenPGP digital signature
Url : http://www.mozdev.org/pipermail/enigmail/attachments/20080311/5e97bf1f/attachment.bin