First time I have had a double entry tourist visa and am about to go tomorrow to get a 30 day extention on the first entry and was looking at the visa and see "enter before 30 September 2010"

Hope that doesnt mean I have to do the second entry before that date.

That is exactly what it means.

Thanks lopburi

That will still be OK as that will be 87 days from my origional entry so I only lose 3 days.