I am also having problems installing CORE 0.9. I have a fresh install of WinXP, updated with latest drivers. Installed HoI fresh, tested, rebooted. Then installed 1.06c patch, tested, rebooted. Then when I attempt to install CORE 0.9, I get a windows file protection error saying that files necessary to run Windows have been overwritten by unknown versions and prompting me to insert windows install CD; I also get a failure message stating that CORE got a checksum mismatch and another saying that it could not find the TOC and aborted. I have downloaded the CORE file twice, apparently with no problem, and the file size matches what the site says to expect (32.9MB). Both CORE downloads fail identically when run, even when run from within the HoI folder.
If it is relevant, HoI is NOT installed in the default location on the C: drive, but the CORE installer never gets to the point where it should (I assume) ask me for the destination folder. This is really about to get on my very last nerve.
Anyone have a tip here?