Thanks my 6 weeks have been heck-tick but I've finished my assignments finally. If you want to know how to tile insert it is pretty easy and I'll tell you in a few steps:
1. Open Advanced maps and load the PKMN ROM you want to edit.
2. Click on the map in which you want to add the tile.
3. Then click on the purple puzzle piece icon then when a new window has open click on Picture -> Save tileset 1 (or 2 it is better to use 2 because it has more space then 1). I forgot to mention you need to pick the palette you want on the combo box which say Palette 0,1,2...ect. You need to do that before you save the tileset which is important. Also I think it is about Palette 7 (it may differ in game) is a blank Palette and you can choose your own Palette in Palette -> Show Palette Editor.
4. Open the save tileset in MS paint or another image editor.
5. Place the tile you want in the blank part of the tileset.
6. Make sure the palette of the tile is the save as the palette of the tileset.
7. Save the tileset and load the tileset in Advanced Maps but make sure if you saved tileset 2 you must load it in tileset 2 otherwise it won't work properly.
8. If the tile is one shade of a colour of the tileset palette then the palette is not the right colour.
9. Then look for the blank spots on the left hand side of the block editor screen and place your tileset in as many blocks needed. Then save.
10. It all should work and be on the right hand side of the main Advance Map screen.
Hope this helps.