thank you, see exactly same on my box.
i think I found what the issue actually is, when I do
rpm2cpio *.rmp | cpio -imv
on the driver file which comes with the media i'm trying to slipstream, i get different folder structure and different types of files...
1 mf file (simply cp file to right place)
1 xml file (with details of the driver, vendor ID's and names)
and 1 o file which i guess is actual driver file...
so as I understand I will have to create exact folder/file structure for my driver, specfile, then get it into tar.gz and do rpmbuild again
p.s. maybe there is some very simple way to create rpm of 3 files?