Well, the update has installed and it booted fine! im now showing 10.6.4 in "about this mac"!!! Massive thanks!!

Just a few quickies - the txt file will not work with the amd patcher? i have installed patcher and opened it, then when i try to drop and drag txt file, it does nothing? Also, when i opened the link you gave me and clicked on the txt file, a text file opened. Yes okay, silly statement! i then attempted to right click and save as .txt file when it offered.

Also, my graphics are now very very dark?

Big thanks so far!