To all who are interested, I upgraded to Thunderbird version .5 and now can use the IMAP protocol. The speed is noticeable with this newer version.
I usually forget to check for recent releases of Thunderbird. Thanks DVDerek.
To TCH-Raul – I don’t have a great answer (like gadeanderson) to why I use IMAP over POP3. I just find it easier for my style.
JonnyTCH