i cannot install 1.29f without receiving errors.. details inside

[explodin dog]

Error extracting support files:

Cannot create a file when that file already exists.

What does this mean, I mean HOW DO I FIX IT!!!
I installed 1.29f successfully before but now it won't work.. man this sucks. Suggestions please?

 

[explodin dog]

Oh, one other thing... I THINK the cab files inside the exe are messed up, I can't open them with WinRAR.. I could extract it all (the contents of the patch executable) but the setup.exe file doesn't work (gives same error) and the cab files (when opened in Winzip) give an error about the size being incorrect (about the ratio to the actual size or some crap, it's supposed to be identical or something).

PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!! PLEASE HELP ME!!!
I'm desperate.. sorta..