Well, I've managed to figure out the issues I was experiencing since installing TestComplete 8 onto a new system and running into various problems with my scripts (that were running and working on a different machine).
First off, because this new machine has Office 2010 64-bit installed, I could not use the DDT Driver for Excel spreadsheets properly and fixed this issue by removing Office 2010 and installing a 32-bit version of Office 2007 (note that I could have also chose to use the DDT Driver for CSV files as it appeared to work regarless of my Office version, but I chose to have Excel functionality so I am sticking with Office 2007 for now).
Secondly, I was having issues sending out email reports from my scripts using the CDO functionality from within TestComplete; Although my emails would appear to be send out without errors, they never arrived in the mailbox specified in the script. Turns out it was due to Avast Antivirus and it's "Mail Shield", which was blocking TestComplete from actually sending out the email reports (note that the built in SendMail function worked however, but I require use of the SendEmail function using CDO as I have multiple attachments that need to be sent with my emails) So by disabling the "Mail Shield" feature within Avast, my emails were finally being sent out as they should. I also did
*not* have to install that CDO package for Office 2007 (
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2714320d-c997-4de1-986f-24f081725d36&DisplayLang=en), nor do I have an actual profile/data file/email account setup in Outlook itself; It just works as is with Office 2007 installed. (and might work with 2010 but I cannot say for certain as I had this issue when running 2010 before but again it was due to Avast Antivirus)
Anyways, I now appear to finally have my old scripts working again on this new machine. Too bad it cost me a day in productivity trying to debug these issues, which is why I thought I would post my findings in case anyone else runs into these same issues.
Thanks.