Read the last section of PAEDISK.TXT.
This is a good advice, I think

Actually, you need something like this:
RAMDISK Q: min=100 max=1900
echo unzipping...
unzip /q /boot FATOS2.ZIP c:\
"min" parameter should be larger, than your unzipped data size (i.e. it guarantee such disk size, even if no memory above 4Gb for it).
Unzip command here will download and unzip archive to ramdisk. Since this point you can modify disk data in QSINIT (for ex., edit config.sys in QSINIT`s text editor).
additional line into OS2LDR.INI
[config]
source=c
and additional line into CONFIG.SYS in zip, it must be ABOVE all storage drivers (danis, ahci, scsi) - to get priority in drive letter assignment (in case of conflicts).
BASEDEV=HD4DISK.ADD
Put your FATOS2.ZIP to tftp and try.