tethering two phones at same time

[treeboy]

Didn't find it in my searching so here it goes. I have two (wifes and mine) TP2's both running stock ROMS WinMo 6.5 from USCC with tethering palns We both have WMWiFiRouter 2.00 installed and share our internet through a Linksys router. What I would like to do is tether both phones at the same time to increase bandwidth preferably through the router but not mandatory. Also, I'm not opposed to flashing new ROM's if needed to achieve desired result since the phones are nearing end of life. Any ideas?