Raise pocket 9's in EP?

[MJL]

I've seen several posters recommend raising pocket 9's in EP with a limper in a small stakes full ring game. My usual standard stops at TT in EP. I am more interested in seeing a cheap flop unless the table is very tight and I expect it to get folded around. If its that tight then utg will usually have overcards. I would rather try to make a low investment, get callers then win a big pot. Please inform me on:

1. Why you raise.
2. Circumstances to make it right or wrong.
3. How do you proceed with a multiway pot on the flop when over cards are present.

Thread advocating raising with 99