Quote: "I would like to know how big on the screen can you make a hud?"
You can make huds as big or small as you want. However, you need to remember that those playing your game have different resolutions set. For example, if you make a hud 800x600 and my sesolution is 800x600, that hud will fill the screen. If you make a hud 300x250 and my resolution is set to 1280x1024, then the hud does not take up the entire screen. You can get fancy and have huds pop up when items are picked up in a specific location on the screen so the player can still see what is going on in game.
Quote: "Can you have options like if you just won a battle and you search for loot have a hud pop up every time you find something and give you an option to take item or leave it, or use a key to pop up a hud that shows you all of your equipment and has options so you can equip, un-equip, drop items?"
Yes, and this is all done via the script(s) that control the hud(s). You can make it as simple or complex, all depending on how well you know the scripting aspect.
Quote: "How would I go about creating and testing some simple huds without having to do a lot of script to go along with it. I have a lot to learn about scripting but for right now I am trying to learn about huds."
A simple way is to make a copy of scripts like the "dooruse.fpi", "pickupkey.fpi", "pickuphealth.fpi", etc. In these copies, change the line
"hudimagefine=gamecore\text\HUDFILENAME.tga"
to your hud you made. You can make huds using applications such as Photoshop, Gimp, etc. In FPSC, if you altered the "pickupkey.fpi" for example, put a key in the level, change the script to use your altered script, and run a test.
Quote: "Does anyone have any simple hud ideas for me to try?"
We posted a few script packs that contain huds
here. Feel free to dissect, pick apart, alter to your hearts content.
There's no problem that can't be solved without applying a little scripting.