I've taken all the screenshots so may as well post how I done it
First open up the heart shape text image and double click on it to unlock the layer, then create a new layer below that layer and fill it with black
Then go to Select and Color Range and use the eye dropper tool to select the white text
View attachment 75437
The selection should look like this
View attachment 75438
Next hit Shift + Backspace to open up the fill dialog and select Color from the drop down menu
View attachment 75439
This will open up the Color Picker dialog, then just select the color you want
View attachment 75440
After Color Fill
View attachment 75441
Next open up the Map image and use the Magic Wand tool to select the black and hit CTRL + C to copy and then go back to the original image and hit CTRL + V to paste it in map above the heart layer
Then hit CTRL T to enter Free Transform to resize the map, double click on the map layer to bring up the Layer Style dialog and add a stroke, then change the color of the stroke and set the stroke size to 5 px
View attachment 75442
View attachment 75443
After adding a Stroke
View attachment 75444
Next go back to the heart layer and select the Magic Wand tool to select the three letters, then hit Shift + Backspace to bring up the Fill dialog and select Color from the drop down menu, this will bring up the Color Picker dialog. Choose a red color to fill the letters
View attachment 75445
Result
View attachment 75446