it request me another disk
The P3D installer used to be divided in 5 parts, but now there are 6.
The one that downloads all the parts is the gsx_p3d4_setup.exe, while the one that perform the installation is is gsx_p3d4_setup2.exe so, it seems you are getting the current gsx_p3d4_setup2.exe, but you are starting from an older gsx_p3d4_setup.exe, one that downloads only 5 parts.
Are you SURE you are starting the installer from a freshly downloaded version on our site and not, for example, from some older download you had earlier ?
In any case, since you are replying to a post from 2 years ago, I noticed now the direct download links posted before were still only 5, so I've added the 6th. Again, these will be the ones which the smaller gsx_p3d4_setup.exe is supposed to download, provided you use the current version.