Digital BW, The Print

I am using PS CS2 on Windows XP and a Epson R2400 and K3 inks. I 
can't afford additional equipment right now for profiling or 
calibrating, so I just use the built-in Adobe profiling utility and 
will have to make do for now.

I am looking for advice on which setting to use in PS CS2 to get the 
best chance of WSIWG or something relatively close. I am a complete 
printing neophyte, so any input would be appreciated.

Specifically, I am not sure whether to select no color management or 
let PS determine colors and whether to select a canned profile for 
the ink/paper combo I am using, and if so where to select it (while 
wokring up the image) or during the printing. Also, I don't know 
whether to select dot gain 30 or gamma 1.8 or 2.2. Using 2.2, things 
seem a bit dark with blocked up shadows.

Any additional prining tips or advice you can add would be 
appreciated.

Strangely, using Piezo K7 inks, Quadtone RIP, and the canned 
profiles, I get very good results everytime, but I have had very bad 
clogging issues and the cost of running endless cleaning cycles have 
led me to try the K3 inks. Also, it would be nice to print glossy 
sometimes.

Thank you.