Toshiba A350-12D

Before everything Im already more than 1 week downloading, burning and trying to install all of the distros from X86 that I could find (iATKOS, Leo4All, KalyWay and etc...) The only one that I can get till the installation screens are the iATKOS 5i from las t December.
The thing is that I can install the system but after the installation over the first boot it goes again over the Windows Again.
Dosent matter when I have no other OS at the computer also because when it boots goes till the first screen with the Apple in the middle :(
I was reading some things about kexts or something like this but from all the forums that I have been searching info before asking say that with this distros we dont have to mind about it, only with the drivers after installation.
I live here the speks from the Laptop:

Processor:
Intel® Core™2 Duo Prozessor P8600
Clock speed : 2,40 GHz
Front side bus : 1066 MHz
2nd level cache : 3 MB

Motherboard with Intel® PM45 Express chipset

Memory:
Standard : 4,096 (2,048 + 2,048) MB
Max. : 8,192 MB
Technology : DDR2 RAM (800 MHz)

Graphic Card:
ATI Mobility Radeon™ HD 3650 with HyperMemory™ Technology
RAM : 512 MB VRAM (till 2,302 MB with complete memory using HyperMemory™ technology with 4 GB RAM)
RAM Typ : GDDR2 (500 MHz) Video RAM (Video RAM and Memory sharing when together)
Bus : 16x PCI Express

and the WIFi that it looks like that all is having problem to install the drivers its:
Intel® WiFi Link 5100

I hope that I can get till the point of having problems installing the WIFI, because for me I just want to install the OS in first place

Please dont mention about the BIOS config because trust me on this one that I already tried all the kinds of combinations and dosent looks like turning of the second core helps because I tryed to install and booting with all the options and it dosent works also, it migth be something else that I have no clue and havent found
:(

Thanks beforehand for your time to reading this post I hopping to get some solution to my problem