You can download the final map release for papago x5 here http://malfreemaps.com/viewtopic.php?f=23&t=11507. You have to register before you can see the download page.  After 31/8/2011 they are under instruction not to release any more update. All papago users are suppose to update to X8. Search the said forum on how to update the map.

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Added on August 27, 2011, 11:44 pm

X8 for android for this region is not out but x8 android for china was already out sometime ago.

Which version are you installing. X5TH or X5SE.

If you are installing the X5TH version. Copy the Thai map to the SDcard first. Then copy the Malaysia map into the Maps directory. Sdcard/NaviTH/Maps/. When you start Papago X5TH for the first time it will read the Thai map first. One in go to Setting to change the UI language (2nd from top) and Voice type (3rd from top) to English and thereafter map to Malaysia.

I assume you run the exe file and select to install the map into the SDcard directly.

1) Did you select the directory for the sdcard or just accept the directory suggested by the installer.
2) Did you select Android version.
3) If you have done the above the new maps should see be in your sdcard/NaviSEA/Maps/MFM-PPG-110823C directory.
4) Go to Papago Settings and under Software version change the Map version by touching the same and the map versions will appear for your selection.

You should be able to use with updated maps. Did you manage to use the August 2011 map.