there isn't too much difference between them,
may be,you can run the pspice netlist in Hspice directly,only add some sentence like .options
Hspice example
*Two stage OP design
.lib ”9905spice.model" mos_tt
.option post nomod
.TEMP 27
* Netlist information
M1 3 1 5 0 nmos L=2u W=8u AS=18p AD=18p PS=18u PD=18u
M2 4 2 5 0 nmos L=2u W=8u AS=18p AD=18p PS=18u PD=18u
M3 3 3 vdd vdd pmos L=10u W=10u AS=12p AD=12p PS=16u PD=16u
M4 4 3 vdd vdd pmos L=10u W=10u AS=12p AD=12p PS=16u PD=16u
M5 5 vbias vss vss nmos L=2u W=7u AS=49p AD=49p PS=26u PD=26u
M6 vout 4 vdd vdd pmos L=2u W=70u AS=490p AD=490p PS=150u PD=150u
M7 vout vbias vss vss nmos L=2u W=130u AS=930p AD=930p PS=260u PD=260u
M8 vbias vbias vss vss nmos L=2u W=7u AS=49p AD=49p PS=26u PD=26u
* Feedback CAP
Cc vout 4 0.44pF
Cl vout 0 4pF
Ibias vdd vbias 8.8u
* Voltage sourses
vdd vdd 0 5v
vss vss 0 0v
vin2 2 0 2.5v
vin1 1 0 DC 2.5v AC 1
*.OP
* AC Analysis function
.ac dec 10 10 100MEG
.probe ac vdb(vout)
+ vp(vout) vdb(4) vp(4)
.meas ac Unit_gain
+ when vdb(vout)=0
.meas ac phase_mar
+ FIND vp(vout) when vdb(vout)=0
* Transient analysis section
M1 3 vout 5 0 nmos L=2u W=8u AS=18p AD=18p PS=18u PD=18u
vin2 2 0 pulse(0v 5v 1n 1p 1p 600n 1200n)
.tran 5n 2u
.probe tran
.save all