now windows 8 customer preview 32 bit is running on my laptop and I just want to know is it possible upgrade to WINDOWS 8 RT from WINDOWS 8 CUSTOMER PREVIEW directly. any ideas?

NO!! It is not possible.

And what do you mean, "NOW Win8 is on my laptop"?? In addition to what other OS?? Cus, if, you switched the OS in your laptop from XP, Vista or Windows7 to Windows8, that was a huge mistake &, ergo, you are pretty much buggered, NOW.

No Beta OS should ever be installed, except as, follows:

1. On a spare machine
2. Virtually
3. As a dual-boot.
4. Run from a USB stick

Never as an Upgrade or replacement to an existing, current, non-beta OS. Never on a production machine.
Nor, BTW, can one move from 1 Beta of an OS to the next or from Beta to RTM, etc... from Build to Build or stage to stage, except by clean installs.

Programs & software must be installed, after a fresh OS install.

Cheers,
Drew

There is no upgrade path from one beta to another beta. When the Win 8 RP is released you MUST clean install, then reinstall all your apps. These beta OS's are for testing only. They are not intended for everyday use.