lan access from internet

We have a pix 515
On the DMZ I have a server who have access to the lan.
The DMZ server have a internet adres 194.x.x.x
our lan have 172.x.x.x

Now I want to get access from Internet to the lan, How can I configure the pix so internet users can go to my lan.
I have already make access-list’s, but I think I must make a static rule or a nat to the inside .?.?
this only temporary for not vpn users, till we have a portal.