Bad disk parameters during install

Reactos 0.3.3 RC1: I have one 76 GB hard drive and a 512 MB hard drive im my computer. As in Windows NT (before SP4), the installer seems to have problems with the first hard drive:
It is reported as 8056 MB harddisk with an unpartitioned space of 4294966952 MB. I didn't test whether it is a cosmetic problem or whether installation into the unpartitioned space would destroy the partition table and / or the file system where Reactos should be installed.