Phone Tips on how to port ROM's

Hello Everybody! want to port any ROM to your android device without FC problems or force closes?! Here's the right place!
THIS IS ONLY A QUICK TIP GUIDE AND NOT THE WHOLE GUIDE!
1) NEVER port ROM's which are not from the same phone manufacturer!
2) ALWAYS make sure that the ROM you're porting has the same specs that your phone does, i.e. the CPU and the GPU etc.!
3)BE CAREFULwhile copying/pasting the system apps! Choose Wisely!
4) ALWAYSmake sure you pack the three folders "System", "META-INF" and the "Boot.img" into a .ZIP and not a .TAR OR .RAR!!
5)Make a CLEAN INSTALL of the phone i.e, Erase all the user apps and cache!