Please advise.

the so called "wall" facing outside/outdoor or is it indoor ?

Timber stud or steel stud with plasterboard. that could also do the trick.

Indoor. I don't want to use normal office use partition type.

you can use stuff like how the "americans" do their home..

actually those office partition can be modded & use plasterboard as wall.

This is more hardy than plasterboard.

http://www.uac.com.my/section.cfm?id=52

any contractor knows how to use this type of material?

macam drywall saja...

The installation is the same as plasterboard, just that this is harder and water resistant.

use full length cabinet as partition

you know the price?

have a check @Bandar Utama condo, the Ceta. they use a kind of partition which I see is quite practical. they even have the brochure of the partition @ the lobby. can't remember the brand though.