Solution: Use original PC install to install maps In Basecamp/Mapsource, select tiles you like to have in your 60, send .img to HD or virtual sd (you need patched BC or MS), repeat for the maps you will want to join later. This way all your .IMGs with have search enabled, join them by Gmaptool.
Gmaptool splitted pc install don't have search, but if you use IMGs made with BC/MS from original pc install, even joined, will have search enabled.
You can rename files in sd in an Android phone using a file manager like XPlore.