You should post your config for the home Pix and (at least) one of the remotes.
Basically you'd need a static to each remote LAN block from Home, with the next hop being the WAN address of the remote, and the DG at each remote pointing to Home.
If each remote also has Internet directly (i.e., not via the Home network), then make the remote DG point to the ISP's gateway, with a static pointing back to the Home LAN or multiple statics if you are going remote-to-remote, with the next hop being the Home WAN address).
Post up some sanitized configs and we can take it from there.
Good Luck
Scott