kazumichik,
'Selamat Datang' that's 'Welcome' in the Malaysian language & probably you will hear a lot of.
Try knocking on Transmile Group as well,that's the freighter company with 727 & 737.
The other one would be Berjaya Air, flying the Dash 7 to exotic islands.
There might be complications with your licence so head to the DCA for clarification.
The links below might be useful
http://www.dca.gov.my/homeng.htm
http://www.mfa.edu.my/faq.html#a5
Always wear a tie at the least.Definitely hot & humid outside but once indoors you'd might think the heater broke.
Good Luck!Do enjoy the food & the place,you'd be surprise.Once you experience how relatively cheap things are here,you'd probably chuck the lonely planet guide.