Unfortunatly due to many changes the old format of maps isn't compatible with the new stk engine.
While you could probably "convert" them by changing manually the XML it's not recommended for a few reason but mainly because the appearance won't be optimal. The best thing to do is:
1) To find the blend of the old track
2) to update it to use the full power of the new engine (like volumetric, fog, depth of field, lights, etc).
3) To update textures to use new high resolution one
4) export it and enjoy

If you want help in the process of converting tracks I can help you (as the lead artist of stk).
You don't have to do a cocoa temple bis. You can "easily" convert them and take advantage of the new engine. Several example have been done like northern resort, the sand track, xr 591