I am running RH 7.0 (kernel 2.2.16) as a router/masq machine with 5 windows machines connected internally.  I have 2 dsl lines as internet connections, - the first is 384k up and down.  The second is 1.5mbit down and only 90kb up.  Is there a way to send all my upload / requests out the 384 line, but have it return on the download side of the 1.5mb line?  That would give me the best of both worlds currently.  Since I'm using masq., does that complicate things?  Would I be better off using Kernel 2.4 with it's advanced features?
 
Thanks
 
Dave M.