I do not know the registry keys...
The path for the program is:
C:\Program Files\Trend Micro\OfficeScan Client\
Not sure what else you will need here... The ofcscan.ini file will give the version.
=================================================
old version:
[INI_PROGRAM_VERSION_SECTION]
Pattern_Last_Update=20090315002615

PccNT_Version=8.0
PccNT_Last_Update=20090224112218

Pccw16_Version=8.0
Pccw16_Last_Update=20090224112218

Engine31_Version=5.500
Engine31_Last_Update=20090224112218

Program_Version=8.0
Program_Last_Update=20090224112218

EngineNT_Version=8.911.1001
EngineNT_Last_Update=20090301004749
======================================================
and New version:
[INI_PROGRAM_VERSION_SECTION]
Pattern_Last_Update=20100214013419

PccNT_Version=10.0
PccNT_Last_Update=20100204170316

Pccw16_Version=10.0
Pccw16_Last_Update=20100204170316

Engine31_Version=5.500
Engine31_Last_Update=20100204170316

Program_Version=10.0
Program_Last_Update=20100204170316

EngineNT_Version=9.100.1001
EngineNT_Last_Update=20100204175638

I really appreciate the help!

PS. I don't think the rocket made it to Tn that I have seen anyway! ;\)