Semi beginner question

[dangerousuk]

Hi, long time lurker first time poster....

I am a long time poker player and after a lot of work and reading feel i have turned the corner into an overall winning player (money is finally coming into my coming into my account instead of going out). I play almost exclusively SNG at low levels ($5-$10 buy in) and although i think i've got a solid enough understanding of pot odds, outs etc where i struggle is putting opponents on a hand (or range of hands).

I've got Harrington 1-3,TOP and a few others but looking for books which can improve this area of my game, hopefully you guys canpoint me in the right direction.

Also (and this might be looked at as Herasy by some on here) I don't have Pokertracker to keep track of my stats. Back in the day before i found the wisdom of 2+2 i signed up with party getting a free version of Pokerspy. Now that i have it i might as well use it, are there any other forums support for this software that can be reccomeneded (2+2 seems pokertracker based)?

Thanks for any help