I'm using setups from here:
http://www.racedepartment.com/f1-2010-setups/ Some of them are good, some not so much, and some are just brilliant, ex Monaco, Hockenheim and Sao Paulo.
Keep on with the manual shifting. I think a good way to learn is to do a lot of time trialing with all assists off. That improves your driving in a lot of areas and you're not in pressure to perform. Spinning in slow corners means you're downshifting probably too much. For example, I was spinning every time at the right hander at Mirabeau at Monaco, because I was downshifting to 2nd gear. Next time I took the corner in 3rd, and there was no problem.
Also, spinning while with traction control off can also mean accelerating too fast out of corners. In F1 2010 I guess the golden rule is to not accelerate at all while turning. I always let go of the throttle completely or do very gentle acceleration while turning in, and then I just stand on the accelerator, doesn't spin me like it would in rFactor or GTR2.