load balancing multiple isp

["ArioS" <christian@xxxxxxxxx>]

Dear,

anyone have experience bout load balancing on multiple isp ? i have 3 
connection from different isp (A = 64kb , B = 128kb , C = 128kb). howto mix 
these 3 isp into 1 virtually.. so if bw on ISP A is lacked then the 
connection will move to ISP B. currently i did manual route for specific 
network to specific ISP... it really hard to balance it with manual route. 
any clue ?