there are many two bath developer formulae, you can find some in the Darkroom Cookbook ) and other books. Barry Thornton has a better description of 2 bath techniques on his website http://www.barry-thornton.co.uk/2bath.htm

I find that 2 bath developing can be tricky, and any slight impurity in the water or other contaminants can cause uneven negs and other unwanted effects. My answer was to try a tanning/staining formula for their compensatory effects - pyrocat hd is superb, but Barry Thornton's DiXactol (in the one bath option) and Exactol Lux are also pretty good too.

good luck!