Routing FTP, Web Browsing and SMTP Traffic Between 3 Different Internet Connections

I have a huge project I must undertake. Currently I have all my internet traffic going out of one T1 line to the internet. My external users (there a lot of them) are complaining of speed and I need to split the traffic up ASAP with what I have available. I need to configure my router to route all Citrix/RDP and SMTP traffic through one T1 line. I also need to configure my router to route all internal user web browsing through a DSL line and then I need to route all FTP traffic through a second T1 line. Can anyone help? This is very advanced for me but from what I have read, it is possible. I have extra routers (Cisco 1700's, Cisco 2800's) and PIX firewalls at my disposal. The 2800 series router can house I think 4 WIC-T1 cards and the 1700 series routers I think can house 2 WIC-T1 cards. It doesnt matter how much hardware I have to use or if I have to trim some out. I have all the configs ready to post and diagrams of the current setup and diagrams of what I invision it to look like. Any one that wants to take a crack at this please let me know. The question is posted at 500 points but if I can get someone to solve this intense issue for me I am will to offer another 500 points throuh an easy question thereafter ;-)