Windows7 Install: Bypass ram check

Hello everyone! :)
I have Windows7 on my computer but now I want too have it on my laptop too!
My laptop has WindowsXP and I never tried before too install Vista on it but because Seven is faster I want too try it on the laptop. (XP is getting old and there are so many windows feautures I can't do with it!)
Unlucky the setup says from the start I have too upgrade my RAM from 256MB too atleast 526MB.
Is there anyway too bypass this check? (Windows7 Build 7057)
The memory of my laptop is not upgradeable :-(

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