How to change "Recent Posts" to "Active Threads" or other heading in BP Social a

Hi, I am using BP Social theme, I need to do the following:

First, I want to change "Recent Posts" to "Active Threads" or something similar in the homepage. Second, I want to have 50-60 Active Forums (Recent Posts) like a blogroll down the homepage using a widget. Last, I'd like a similar number of Recent Comments instead of the maximum 15 the theme/widget presently allows for the above.

I am using BP Social with MU, without BP. I am considering using regular WP not MU, is there anything different to do?

Thanks in advance.

W.