For those wanting to add TRIM support to windows 7 with their OCZ-Summit drives we now have FW19C available for end user flash.

This is a destructive firmware update...back up all data on the drive first

The files have to be written to and executed on a bootable USB drive. Microsoft DOS 6.22 or 7.0 works well and the drive has to be in IDE mode.

Both a guide and the FW are available from http://www.ocztechnology.com/ssd_too...t_Series_SSDs/

The guide and FW files are also available in this post.

Grab 19C here: Summit 19C

Link to a revised guide with pictures

I'm going to make a personal recommendation here, if you are using a MAC i would consider staying on 18C or flashing to 18C from 1801.
Also, consider at time of writing we have not found a way to back flash, so if you flash 19C you can not go back to 18C...so you need to be sure flashing the drive is right for you.

We are working to get more options, nothing is guaranteed though.