[Q] [Updater Script]Will This Updater Script Work ? topic

Hi , I want to make a kitkat custom rom so I downloaded a META-INF.zip ... When I edit the Script it Shows The Code

Code:

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ui_print("Android KitKat ROM Update 4.4");
ui_print("Starting Installation");
mount("yaffs2", "MTD", "system", "/system");
ui_print("Mounted /system");
ui_print("Copying /system...");
package_extract_dir("system", "/system");
ui_print("Copied /system");
ui_print("Done! Enjoy Your New Android Update");

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I Want to know that if I use this script would it be able to install the system folder(Custom Rom) on a phone......

Any help is Welcome....