I spent a far few hours, trawling, googling, copernic'n and using my own skillz
to find a way of changing file associations.
Really, I spent about 12 hours over 3 days during my spare time.
Anyway, the problem seemed to be that all temp files would open only with notepad and their association (.tmp) was corrupted.
So I hacked registry not work, soon as I rebooted, went back to same association, I
downloaded some double click reg files to fix problem, same thing, went back to notepad association, I then went via windows vista file association changing, I even downloaded Creative Element PowerTools v2.9.920 freeware, still not working.
So I then thought, lets create a new account and build my settings how I like them and
then delete my older account and be done.
I created a new admin account, then found errors in it such as not been able to show hidden files, which defeated the object of checking temporary files as I could not navigate to them without hacking the registry to repair.
It was getting near my 20:00 bedtime when I deleted that account (new one) rebooted and went to user > Lee > AppData > Local > Temp and to my shock all the temp files were correct, not corrupted and said blahblah.TMP.
Anyone have any idea why this may have happened, because I get the feeling if you create a new account the settings are newer so other problems maybe repaired when it came to a dodgy entry in the registry.
Windows Vista 32 bit Home Premium saved my soul yesterday, as I was going mad.