What are 2 MCs? Have you got an oversupply of rap artists over there or something - MC Hammer?

As for initialising your lcd display - there's plenty of 'c' code examples kicking around. 4 * 20 is much the same as a 2 * 16.

Checkout the code library, tutorials and/or the Keil web site.

Also you haven't told us:
1/ what cpu you're using
2/ what clock speed
3/ how you expect to connect the lcd
4/ what 'c' compiler you're using