Im trying to get rid of "chulk board" and hopefully the black bar below, how do I do it?
MenuBG is the bit that is showing the background with the chalkboard, the Shadedbar and Footer are responsible for the dark/black bar at the bottom.
how can I delete the little triangle from the bottom right corner? Thanks in advance
Probably something in your HudPlayerClass.res also responsible for the red square on the left behind your player model.
Both things @TimmyEnglish and @swibel_ could have figured out by using the following:
sv_cheats 1; vgui_drawtree 1;
as well as ticking the 'Highlight selected' in the thing that pops up when enabling the VGUI Drawtree and navigating through the elements on screen.