How to allow PPTP connections through a pre 6.3 firmware Cisco PIX!

Logon & enabled configuration, then use the following code! Remember to write the change to memory before testing.

access-list outside_access_in permit tcp any host (public-IP-of-VPN-server) eq pptp
access-list outside_access_in permit gre any host (public-IP-of-VPN-server)
access-group outside_access_in in interface outside