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I chose the copy maps once but it took forever to get a few percent done.
NELDML,
I just purchased a 541s and I have not come off the hip for the g2 vision card $$$. At this point I just want to get my waypoints from Homeport to my 541 so I submitted a trouble ticket. Here is their response:
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If you have created waypoint data in the HomePort program, please follow these instructions:
1. You will need to format the SD card in the GPSMAP 541s. To do this, simply insert the SD card into the device while it is powered off.
2. Power on the chartplotter and when the I Agree button appears on the screen, the card will be formatted correctly.
3. Once the card is formatted insert it into the computer and open the HomePort software.
4. Create all of the waypoints you need, or if they are already created, right click on the waypoint or select multiple waypoints and right click on them and choose Send To, then Choose the GPSMAP 541s (which is actually the card you just formatted) and then choose untitled.
5. At this point, the information will be transferred to the SD card.
6. Insert the SD card into the device while the device is already powered on.
7. Choose Manage Card
8. Choose Merge From card.
The information will now be copied from the card into the internal memory of the device and can be used for navigation purposes.
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I have not tried it yet but hopefully it will work.