Replacing from old tech pcells to new tech pcell in layout

 Thanks So Much Andrew

what ever you given code & expressions working for schmatics,thanks a lot ,but now

I want to replace /convert from old tech pcell (pmos & nmos ) layout to  new  tech pcell (pmos & nmos ) layout,is it possible or not

previouse you given tar file converComp.tgz ,in that i used command 

 abConvertComponentParamsForLib("myLib" "schematic" "conv.config")

so,insted of  schematic ,i want to convert layout also 

please letme know

thanks in advance please....

now iam using Virtuoso 6.1.6-64b

Thanks,

venkatasiva.j