Im trying to currently create a VPN on my home network ( which is all currently Peer-to-peer settings) so that I can access it from anywhere outside our LAN. The model of our Linksys router is the WRT54GS which can supports both 802.11B and 802.11G standarads as wireless capabilities.

I read through the User manual, but the instructions to setting up a VPN passthrough was not very informative. As much as the manual told me was that I can enable IPSEc passthrough, PPTP passthrough and L2TP passthrough for the VPN passthrough options.
I have a basic understanding of the security protocols, but the manual does not tell me how I should access my home computer from a remote workstation when VPN passthrough is enabled as well as setting up an authentication check. More information would be highly appreciated