LP Kitchen?

Been trying to make a stock 5.1.1 rom for the 12.2 based on the US version. I get system.img uncompressed. I cant help but feel im missing something. It Wont boot. Mabye my meta-inf is off? Thats why im looking for input on a kitchen that will work with our tar files. Or at least a complete guide. Ive been looking online for the past 3 days.

Thanks in Advance

Stealthee