here's my hardware:
cpu: core2duo E2000; mobo: gigabyte ep45-ds3l; dh: hitachi 500go sata; dvd: LG; mem: 2go kingston; Wlan: asus wl-138g v2
I've choose all my hardware from the HCL of osx86 for 10.5.2 and there are no personnal data on the HD
i have a retail DVD of Leopard from a Mac mini (dont ask me how...), could I tried it on it?
Possibly. Some disks installer checks the target hardware and will say "cannot install on this machine" if it doesn't match.
i've dowload the LS8 pack v12, should I use it after the install?
The LS8 pack/method is designed for when you are installing mac osx onto another disk from an existing installation. Useful if you have two macs, or even just one mac with a spare disk (the target can be a USB disk). The pre patch prepares the disk, and post patch (post-install) replaces certain kexts which are not compatible. I'm sure you have the link already -> LS8 method
If you have a spare disk (10-20Gb will do fine!) I would install a simple kalyway or whatever is easist on the spare disk, boot from it, and use that to install retail on your main hard disk.
i have dowload broadcom v2 driver from "insanlymac" to, do I have to use it or my Wlan will be detect as well without it (I think I should, but I rather your advise)
No, you don't need it.
What did you do for your 138gv2 to work?
Nothing, it worked out of the box after retail install based on LS8 method. It also worked when I did the Kalyway method some time before I did the retail install, but I found the wlan wasn't reliable.
on the contrib dvds I use I have to check some option if I want my MOBO to sleep well... the retail will correct this?
Follow the LS8 method, and make sure in energy saver preferences that you set the "Restart automatically after a power failure".
ps: again, sorry for my crapish english
No problem, I live in a foreign country myself, so I understand.