i had the same issue as ozzybmx – nightmare.
I had massive issues getting my tyres to seat (Panaracer XC Pro’s) Finally managed it and off i went to Nepal. On day two got a puncture. I spent an entire even trying to seat the tyre (to the amusement of fellow cyclists and Nepalese bystanders) A chap came out and took me to a local motorcycle shop – and in two seconds he got it to seat.
So, the moral of the story is……….. I know a geezer in nepal who can help you!