Thanks ndi, your last message sounds very interesting. I'm not much expert in english language, and I've understood partially each one of your answers:

• I don't know what is "PR"
• I don't know about which "radio modem" are you talking, or why in this context, same as some GSM or why is related to the question (doesn't it work with a normal software driver as any other device?).
• "reflashing both the root and the EMMC"... Doesn't the EMMC the internal place where the root is put?
• The lock code? I've read the Nokia N900 hasn't a lock-in. Is it stored in some else place?
• "modified PR 1.2 there's no telltale"... I don't understand the expression, sorry.
• "should you fry your device with OS"... are you talking about when replacing a kernel? The Maemo Linux kernel or another kernel? Which are the flashing movements with more possibilities to definitely brick the device? What is "OC"?
• The Nokia N900 has water coolers?

Please, could you explain your answer to make it easier?
Thanks.