Sorry, my mistake based on what was what was writen [Only registered and activated users can see links. ] in regard to nuvi2xx7 & 3xx7 using Type 21. I've been previously able to mod both my 2797 and 3597 logos using GIR_Editor v0.56 without problem. This is 2797 with the lexus logo intended for nuvicam:

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Clearly 27x7 doesn't in fact have Type 21 as was said, at least in the logo.bin.

When i try to mod the nuvicam logo this is the result, same as aspireryan reported:

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On reading that post again, i now think Alviora was referring only to the symbols in fw1_resources.bin, and not images in logo.bin.