Currently i'm working on my own php-mysql with zend website project, i don't have to much time to work on developing my own cms so i am going to use TOMATOCMS - http://www.tomatocms.com, and nearby three months are required to develop my own, and after that i want to switch my site to my own scripts, my que. is how can i use?/is it possible to use? database and records created by TOMATO with my cms?

I really don't see any problem with the database migration to your own cms script, as long as you maintain the same database query used by the tomato..

AND as long as you know the database structure, you should not have any problem in doing any CRUD on it..