Homebrew Various Troubles with Various Applications

[Crimson Cuttlefish]

I was trying iHalo (Mod for the Quake DS engine that makes it look like Halo) and I'm getting an error stating that "gfx.wad" could not be found. Has anyone else who played this game got this issue, and if so, do you know how to solve it? Thanks in advance to those who can help!
(For those who don't know what it is and/or want to try it, it can be found on GameBrew.

EDIT: Also having some trouble with Windows 3.0a Mutltimedia, when I type "win" (also tried with /r, /s, and /3) and I get the following error messages:

Cannot open program group file "C:\MWINDOWS\ACCESSOR.GRP"
Cannot open program group file "C:\MWINDOWS\GAMES.GRP"
Cannot open program group file "C:\MWINDOWS\MAIN.GRP"

(each message(separated by line breaks) in different windows)
and then I get to the featureless "Program Manager" screen.

EDIT #2: Is it possible to change the background for YSMenu? I have it on my R4, and accoording to the guide, all I have to do is change YSMenu1&2.bmp, but when I do that the background just turns a light grey.