(not my work, all credit goes to those who made this possible)
Follow the instructions in the above link (obviously at your own risk! I will not be held responsible for any damages done from the use of the guide). I didn't use a memory stick but instead downloaded the files to my desktop and installed/transferred them from there (this is outlined in the guide as fine), however, for modding newbies you should follow the guide instructions, as having the files on a separate drive makes things a little less confusing.
Note: The required program ISP_1528.exe DOES NOT work with the 64bit version of Windows 7, but is confirmed working with Windows XP (32bit), Vista (32bit) or Windows 7 (32bit).
The program in this guide removes the time/date from video only, it will remove the t/d from stills (camera mode) but will leave a black box where the t/d used to be.
Once you get to part 21, check the size of the backed-up firmware (1528.bin.brn) in folder C:\isp\download - this should be 1,735,852 bytes (once confirmed make a copy of the 'download' folder and store it elsewhere just in case you need to re-flash the original firmware back to the cam) - if it's not then DO NOT proceed until you have posted the exact size here so I can compare with other known compatible firmware's. Also, if you get ANY errors or freezes during the back-up then you must start over.
That's it, as I said before any mods of this nature are NOT for the faint hearted, you should only proceed once you have fully read the instructions and feel confident that you know what you are doing.
If you're not sure about something then post here first and I will try to guide you.