How to get links in the left submenu to show in main contentblock? (target)

[heidig]

I have a horizontal mainmenu with 1 level. And a vertical submenu, for each page. I want some of the subcontent to show just in the maincontentblock. I think I must use target, but don't know how, and I dont want to change every link, but to change it in the template. . Especially for the blogentrys this is important, that I can have the entries in a list in the left submenu, and just the maincontent block is changing when clicking.
Sorry for my bad english, and bad explanation. I understand basic html and css, but I dont know what to do, and where to put it in the vertical menu template. I use the template Leaves, by Andreas00, made into cmsms by mark (?).

(Would it might be easier to make a new submenu-template instead of changing the existing?)

I would be very thankful if someone could help me.

Heidi

[Dr.CSS]

You need to give a little more info, like what ver. of cmsms and what module you are using, News and CGBlog sound like what you need...