Playing as Gutland in version 1.5 i managed to play for 103 turns without a crash, however i did not play many real-time battles.
I realise that i may have caused the CTD to re-occure by changing too much in the wrong file. Now i will re-mod the 1.5 version with the bug-fixes and the music only, and leave the rest as it is.
Hopefully that will leave the mod stable and at the same time give it the new music and fixes for silver surfers, wrong bodyguards and missing portraits and descriptions etc.