Fonts

Im having an issue in XP and Vista with fonts. On my XP install package, instead of installing the fonts, it destroys the fonts... The fonts are in the fonts folder, registered and everything, but my program defaults to Arial because something is wrong with the files, once i manually delete and replace them, fonts work fine...

In vista, when the installer tries to install the font, i get an error. Basically its the permissions.. Its not allowed to write to the folder, how do i get around that? I know you can right click things and choose Run As Administrator, but you cant do that with a .MSI file... How do i install fonts?

Nobody knows? Nobody's had this problem before?

Fonts will NOT install on XP or Vista no matter what installer i use... Why?