Replace openvpn package with my custom build package

[koorosh_kdt]

Hi
I use the PFsense more than 5 years , and it's firewall in more than 12 companies already :D that i installed you job is greate! you make some thing greater than imagination

but as i mention in subject i want to replace openvpn with custom build of myself , i want to know how can build it for pfsense

P.S : already try to make it at 8.3 FreeBSD i386 and move it to PFsense but it's not working :)

will be really appreciated to guide me :)