How to edit sidebar?

[tahbikat]

Thanks, I tried messing with the widgets and modules but they confuse me...

I've tried inputting html and php with and without tags but I get errors every time. Probably doing something wrong. ;-;

I mean is there a way I can just build my own sidebar, without using widgets and modules, and just disable the original sidebar? How do I put php into a .tpl file? :c