Just use the latest microSD method at the end of post #1 to enable all possible features. It will convert your 37xx to 34xx, change the logo and enable the extra features in one easy step. Be sure to do a files backup and NV backup first as well and rename/remove the files detailed in post #1, and also clear nv before and after flashing. Read the whole of post #1 so you have a clear understanding of what you're doing before you do it though.