Intel Toolbox does not support G1's with the Optimizer feature.
Though I always advise against secure erasing
Absolutely, but the question was how best to wipe the drive.Perhaps I'm being ignorant but can't you use the windows installer to format the drive like any other device?
The Intel SSD Toolbox Secure Erase feature will work with a G1 drive. You first need to delete all the partitions on the drive - then run it and it it wipes everything out at low level. Easiest way to go, really.