>Sorry for quite confusing subject, just i don't know how exactly express my
>ideas :) Not sure where exactly should i post this message..

tech-embed is definitely the place for this type of discussion.

it sounds like you are describing crunchgen. man crunchgen, and take a look 
at src/distrib/i386/floppies/ramdisk-big/list for an example. crunchgen does 
have limitations and caveats (which i can enumerate upon request) but all 
can be worked around in one way or another. and there is an advantage of 
sharing all common code pages w/o ld glue. :^)

best regards,
jared.