is there a way to convert spectre netlist into hspice ?

... try this in Wordpad (although for some search and replace functions, Word might be better)

***************************************************************************
***      Spectre            to       Hspice
***      //                               **
***      \                                <return> +
***      Inn                              Xnn
***      subckt                        .sub
***      ends                          .ends
***      resistor r=                  (empty)
***      capacitor c=               (empty)
***      sa, sb, sca, scb           (comment out)      NB: ignored in Spectre & Hspice
***      scc in MOS                  (comment out)      NB: ignored in Spectre & Hspice
***      (Vdc3/2)                     'Vdc3/2'                 brackets ( ) to single quotes ' '
***      Rnn n1 n2 rppolywo     XRnn n1 n2 rppolywo
***************************************************************************

You may have to write a subckt for XRnn depending on the foundry model files you are using.

I find the above covers most cases.

Cheers,
           SimonH.