I used parts of every post from this topic to make it work.
I downloaded the Iatkos s2v3 (10.6.3) --google it.
I used Transmac (15 days trial or google a cracked version if you like)
inside Transmac, following posts here, I formated my 8gb pendrive to hfs and "burned" my iatkos ISO into it (without renaming to .DMG)
I used my other pendrive (1gb) to install an image file with the bootloader for mac (
http://osx.mechdrew.com/downloads/NBI_083F.img) with Win32DiskImager (
http://launchpad.net/win32-image-writer/0.2/0.2/+download/win32diskimager-RELEASE-0.2-r23-win32.zip)
on my laptop (toshiba a205-s4777) I plugged both pendrives at the same time and pressed f-12 (might be another key on yours) to get the boot menu, and booted on USB memory
the bootloader on the 1gb was loaded and recognized the 8gb one as the mac instalation DVD, just had to press enter pretty much.
no mac and no dvd required. just an ISO and 2 really small softwares.
I've been having a few kernell panics trying to install everything, so I have to re-install over and over on the trial and error basis, and both pendrives plugged in are working flawlessly for this.
(ps.: my main PC (this one) has no cd/dvd drives (or any drives at all) and my laptop has a cd/dvd drive but it has been broken for years now, so this was my only choice.)
EDIT: just a small FYI that might help some people, all my kernell panics stopped once I started booting 10.6.3 with the 32bit flag.... aparently the 64 bit side of it was not in harmony with my hardware... (which is weird since i run linux and win7 64 bits on the same pc, but anyway, though it was good to point out)