the issues you may notice while trying to create your own map is based on textures, graphics and models you use into your map, usually you can save the maps as *.w3m as long as you dont use files or extention from the tft ones. Means even when you install the original WE you will notice the same problem or you just cannot open the map with the latest paches anymore!
...for converting your TFT map to a ROC map you would have to export ALL FILES you have used in the map for a ROC appropriate format.
...thats just the reason why I never continued my work on my maps, its just a horrible SHIT of work to do all the steps neccessary that you can use the map on ROC
...i also suggest you to use the WORLD EDITOR UNLIMITED aka WEU, google for it =)
Kind regards
UnExiledBrandy
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The fool thinks that those who laugh at him are all his friends,
unaware when he sits with wiser men how ill they speak of him.