Doomedsincebirth wrote:How do I go about making zdoom my default wad file proram...? (sorry I just haven't done this stuff in forever

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In Windows XP:
Right-click any WAD file.
Select Open With... from the menu.
If you get a box asking if you'd like Windows to search for you, choose the option "Select the program from a list" and click OK.
Make sure "Always use the selected program to open this kind of file" is checked, and hit the Browse button.
Browse to and select ZDoom.exe, then click OK.
From now on, any time you double-click a WAD file, it will automagically load in ZDoom.
There's a few catches to this, though. ZDoom will not try to detect what type of game the WAD needs. You'll have to select it yourself. If you put all your IWADs in the same directory as ZDoom.exe, it will let you choose which to use each time you start it up. If the PWAD contains resources not compatible with the selected game, it will cause Bad Juju or might just not do anything at all. (Or at least, nothing useful)
also, how do you enable multiple pwads through the command line?
zdoom -file <wad1> <wad2> <wad3> <deh1> <deh2> <bex1> <bex2> ...
Files later on the command line will override earlier files. And in case you don't know, DEH files are Dehacked data files, and BEX files are an enhanced version of the same. Technically speaking, ZDoom doesn't differentiate between the two, but its common convention to name a file BEX once it's been modified beyond what Dehacked can handle.