QTR-Quadtone RIP

I was wondering if any of you guys can help me. I had question in the past and this board was more than helpfull. I have epson 2200 printer that I have converted to flat bad printer. It works great and if anybody needs info I can help you with it. I am planing to use it for printing on T-shirts. Only problem I have is printing on dark shirts. I can use QTR and setup LB, Lm and Lc chanels to print white underbase. I have setup curves Lb 100% ink limit gray ink, Lm 100% ink limit tonner and Lc 100% ink limit tonner2. Since I like to put as much ink as possible on the shirt should I setup Lc and Lm also to be gray ink or live it tonner and tonner2? 
Most important question is: Since i would be using Lb, Lc and Lm for white ink is there any way I can have my CMYK chanels to print image without Lb, Lc and Lm. I know there are rip softwares out there but they are so expensive. Is it posible to create profile for epson 2200 that only uses CMYK channels for color images and profile for Lb, Lc and Lm so I can for example use photoshop to print white underbase and than switch profile and print color image on top of underbase. I am searching for almost two months with no sucess to either find some free rip software to do this or driver. If you guys have any sugestions please help me.
Best regards
Bo