After buying a blacklisted Broadcom A,B,G,N WiFi miniPCI card(BCM94321) , I have downloaded the maintenance guide of my COMPAQ CQ70-118ef on HP's website.
After reading all the datasheet, I found that HP&Compaq laptop were fitted with Atheros 5007EG or Broadcom BCM94312MCG for Europe ( Rest of the World they said ! ) : after a quick search on InfiniteMac & InsanelyMac community , I saw that the Broadcom 4312MCG was fully accepted in MacOSX as an Airport Adapter.
So I have goggled on Web, in order to find an original HP's used WiFi card, and I've found it with the HP's SPS-Number 459263-002, for only 20$ in Singapore.
I receive it, I put it on my Compaq, I re-install iPC 10.5.6 with Broadcom kext and....

THE MIRACLE !

!!!!!!!!!!!!!!!!! AIRPORT fully OK !!!!!!!!!!!!!!!!

Now, only the HDMI port is disable, but the rest is OK.

ThanX to All the osX86 community !

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Apple's Mac OS X , c'est le rêve !
*New Workstation: 4 Core Intel Q6550 12 Mo L2 o/c from 2,83 to 4,08 GHz ( 8,5 x fsb 480 ) with NOCTUA pipeline aircooler, Gigabyte GA-EP45-UDR3 motherboard, GeForce 8600GT;4Gb Corsair 800 MHz ;2xHDD 500 Gb Samsung ; 22" LCD BENQ ;apple alu keyboard; ANTEC P182 hardcase, iPC 10.5.6 PPF5 after very good result with Kalyway 10.5.2 on my previous Athlon64X2 6000+ on a K9N SLi Platinum
*Compaq CQ70-118ef laptop with iPC 10.5.6 fully working except HDMI output