How do I remove 6.60 ME CFW --> and get back 6.60 OFW?

[technix]

I am sorry is this is a noob question, but I have been looking for hours searching the web and this forum.

I have PSP 100X with CFW ME 6.60 (ver2.3) installed and running.
I know I can reboot the PSP into OFW by holding HOME and Powering on.

HOW DO I REMOVE CFW ME 6.60 (ver2.3) completely? I am looking to sell my PSP on eBay.
Some people say to run what you used to install the cfw me 6.60 and press SQUARE to uninstall or remove, but i only see X to install again or Circle to cancel.

Thanks in advanced, this is an awesome community.

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[fate6]

Hmm the installer should have an uninstall option but if not then just install the 6.61 OFW, It will overwrite the CFW.

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[technix]

Hmm the installer should have an uninstall option

That is what I had read others say also, im so confused how i just dont see it anywhere.

just install the 6.61 OFW, It will overwrite the CFW

Ok - and if they wanted they could always downgrade OFW to 6.60 correct? Then install the CFW again.

[fate6]

6.61 has CFW anyway so no point in downgrading.