Add several coordinates to one POI

straight from the MapThis wiki...
http://en.wikibooks.org/wiki/Map_Thi...ing_a_POI_File

Creating a POI File

Click on the POI tab

Local.Live/Google/Yahoo

1. Enter your search term into the Search for: text box

2. Navigate the map to your desired area (you can use the Search Maps)

3. Move the map around a bit

4. Click "Get Numbers" and make sure Lat/Lon/S text boxes get populated

5. Click the Local.Live/Google/Yahoo radio button (if Google, choose relevant google.com/.co.uk/etc.)

6. Click "List" and make sure the datagrid is populated with your POIs

7. Enter a file name, starting with _, into the Save POI (start with _): text box

8. Click Save POI (start with _):

9. The file will be created in the same directory as the application, place it into the corresponding map folder

when you open the file under notepad/wordpad this is what you shall see, something like this

!IMAGE:cinema.png,
49.288185,-123.114783,CN IMAX Theater,201-999 Canada Pl// 800 582 4629,
!IMAGE:food.png,
48.429389,-123.384548,Spinnakers Brew Pub,308 Catherine St.,
48.425170,-123.362623,Hermann's Jazz Club,753 View St.,
48.427630,-123.361997,Ocean Island Backpackers Lodge,791 Pandora Ave.,
!IMAGE:market.png,
49.271876,-123.135917,Granville Island Public Market,Granville Island,
!IMAGE:motorway.png,
49.163909,-123.934510,Departure Bay Ferry,680 Trans Canada Hwy// 250 753 1261,
49.163389,-123.893050,Duke Point Ferry,400 Duke Point Hwy//250 722 0181,

now if you have multiple POI files, you can copy and paste the data from one file, into another file .. thereby haveing one POI file with tons of stuff in it

hope this helps..