Thanks again for all the info guys (that was an interesting article in that link as well).
I've been running the rig for 8 days now since the last CPU was installed, gaming, browsing, etc. Everything I have been doing on the system for over a year. So far, no trouble. I've stress tested it with Prime95 (20+ hours, no stoppages or errors), 3DMark, and AquaMark3.
These are the temps I have recorded during almost constant monitoring with Everest:
Have not constantly monitored MB and HDD under load as they have not been an issue.
And the final specs on the rig after new CPU and cooling (Mid-tower case):
PSU: Cooler Master 450W w/120mm fan
MB: ASUS P4C800-E Deluxe (socket 478)
CPU: P4 3.0 (Not HT, no OC)
HSF: Zalman CNPS7000B-Cu (92mm fan, almost all copper, fan speed controlled by a direct-wire potentiometer at highest setting [2500RPM])
THERMAL COMPOUND: Arctic Silver 5 (applied exactly according to specifications on their website/manual)
GPU: RADEON 9600XT 128MB
GPU HSF: Arctic Cooling VGA Silencer Rev. 3
RAM: 1.5GB Patriot Cas-2 PC2700 DDR (3x 512MB)
HDD: Maxtor 120GB 7200RPM
CASE FANS: 5x 80mm Cooler Master (2x lower-front intake, 1x center side-panel intake, 2x high-rear exhaust), all unobstructed inside and out of case.
2x 5.25" CD drives
1x Floppy Drive
Sleeved IDE cables added to replace standard "ribbon" shape to help airflow.
Hopefully it holds up this time. If not, I'll probably scream like a banshee and put a bullet in it for causing me the stress and will return to the message boards barring a PC-problem induced suicide.
Thanks again for the helpfull links and info everyone