Hi Peio,
The forum have been intrested with PCI32tlite with 64K mem BAR0, see at http://opencores.org/forum,PCI,0,5834 I have sent the files to forum, you concider wether to update files in the project or we can add a new brach.
Danny
Changing BAR0 memory map size it is too trivial. Not worth adding noise to the OC Projects.
Also the PCI bus is a dead bus, sure no much people interested on it.