Can 32-bit Linux be installed on 64-bit laptop (and is it a good idea)?

[Reshat Sabiq]

>
> I have the Compaq Presario M2105 (M2000) with the Mobile Sempron
> 2800+. The XP I have has a 64 driver for it (???) but I run it
> under Fedora 4 (x86 32bit). I use the normal VESA X driver (1024x
> 768), I can't get the modem working or the sound card (though FC4
> load ATI drivers for it and the mute button stays lit). The USB
> works, the LAN port works, the Broadcom card works with the
> ndiswraper package. I'd like to get the sound card and modem
> working (never know when you need a modem). I have a 40G drive
> and 512M ram (32M give to the weird ATI Radeon Expres 200 M).
>
On my 32-bit laptop, the built-in modem doesn't work on Linux either. 
But generic IBM modem i bought 3 years ago works.
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