how can I made a 12vdc to 19vdc booster/regulator?
You need a boost regulator, check this one out from TI.  There's a reference schematic on the first page http://www.ti.com/lit/ds/symlink/tps40210.pdf

Or maybe this module from linear, it's a little easier to design: http://cds.linear.com/docs/Datasheet/4607fb.pdf  

Page 21 has the ref schematic for that one.