Keep in mind that the info at the end of Post #184 on page 19 regarding xml editing for enabling feature is now useless and quite out of date. Also the fw version 4.40 is ancient and that Post #1 has been updated by catymag many times.

But sure, it you find it easier to follow, just substitute the current v7.90 fw but only follow it up to and including point 16 with the following amendments:

Point 1 needs to include 'do a NV backup' as well of course and also do it again as 34 after Point 16.
After Point 16 use the tut for flashing the logo and enabling features in the last part of my post #944 above, i.e. after this: 'You've already flashed the full 34xx firmware, so now you can just do the SD card thing again.'

You can also substitute that other method he uses for entering pre-boot mode on the 37 with the one from my post #927 which worked for you before, or hold just above the G as shown in the image in Post #1. Also check the extra info in my Post #930 again.

You've already got the tut from page 19 copied, so make those amendments yourself if you like before you start. We normally don't give such close individual tuts as this, so you should feel very honoured ...