load balancing, dialup routing, and VPN

first, hi all
this is my problem. actuaclly more a question
here it goes:
scheme:
connection to isp1 (leased line) isp2 (wireless)

server

LAN1 LAN2 DIALUP1 DIALUP2

current logic:
both lan and dialup ip's are automaticly assigned thru DHCP, and routed thru isp2 (wireless).
needed logic:
first: server needs to make split access with isp1 and isp2 (found LARTC and I think it will do the job)
second: VPN network access. server listen on both isp1 and isp2 but firewall allows access from only selected ip's and after firewall let them in, and authenticated with VPN, they have access to local network. question here is, what VPN software to use ?
thats my main two concerns, others are related with administrating it, and I think php/mysql will do the job.

please make any suggestions about making this kind of network. basicly server is here to route, only web and mail is also on server.

thanks

You are gonna hafta re-write that I have no idea what you are asking.

suma summarum:
I need program that can combine two network connections into one route, and program that can make VPN. both for linux.
any suggestions ?