step 1. download tunerpro (non-rt normal version is fine)
step 2. download the EEX xdf from my site
step 3. load the eex xdf into tunerpro (xdf menu, select xdf)
step 4. under where it says 'parameter tree' change 'view by' to 'category'
step 5. file-> open bin (load your bin)

if you want to start out easy, you can use the autotune form on my site to generate a bin for your gears and whatever and start with that one.

if not, the eex xdf includes a spreadsheet that helps you calculate the necessary values for your new gears.

i'd work on a COPY of your bin and make a folder for each revision of the bin, with each one containing any logs you've taken for that bin. with eehack saving your original bin is important since it modifies the program slightly while flashing to improve the datastream (and your datalogging capabilities) a bit.