Hello everyone and thanks for your interest.

I share this information from another forum:

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eTrex 20x/30x | 2250 | 290 | MAP: Yes | GMA: Yes | MSV: Weak | GVS: --- | File: eTrex20x_30x_Webupdater__290.gcd
eTrex 22x/32x | 3445 | 250 | MAP: Yes | GMA: Yes | MSV: Weak | GVS: --- | File: eTrex22x_32x_Webupdater__250

MSV: Weak - it verifies the validity of map signatures in a simple way, you can unlock an .img using gimgunlock-0.04 (without patching your firmware), but in case of unicode maps (CP65001) you must modify the CP value (see the Temporary authentication of Unicode maps*).

Firmware updates are done by GE or manually by Webupdater (not Pre Boot mode):

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[Only registered and activated users can see links. ]

Birdseye JNX can be Patched

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[Only registered and activated users can see links. ]

Download and unpack, eTrexXXx_XXx_Webupdater__XXX_JNX.gcd to your PC where your device is attached.
Then you drag-and-drop eTrexXXx_XXx_Webupdater__XXX_JNX.gcd onto the WebUpdater icon on your desktop.
The Firmware will be flashed on Device


Warning:
Be sure to remove All BirdEyes images (JNX files) already present on device before apply the Patch
BirdEyes images can be restored after patch is applied.