???okay now i'm confused.
The story behind all this is there was a Gamepark 32 version of doom that was modified to allow larger screensizes then 320x200. This was done to accomodate the GP32's larger screen (320x240). So, a few people made wads that used this "bug" to make more detailed title screens.
Idoom (the ipodlinux version of doom) allows these non-standard wads to be run because it was compiled without errorchecking. Rockdoom has this error checking enabled because while these wads will run for a bit in it, eventually they will crash. (rockdoom has scaling for larger screens to properly size the graphics without messing with the data stored in the wad).
IDoom is based on the original doom source and handles it's graphics allocations differently then rockdoom (which is based on prboom, an extremely modified version of the original doom source). This difference in the way they handle their graphics allows idoom to continue running as the oversized graphics are still overwriting sections of memory that they shouldn't, but there are 6 buffers that are all allocated next to eachother so over sized graphics just overwrite other buffers causing little harm. rockdoom allocates and frees it's graphics buffers as their needed meaning you don't know what's going to be overwritten (it could be level data, sprites, game logic variables...).
Those GP32 mods are popular as they seem to have interesting titles (halflife, quake, duke nukem...) but in my opinion are some of the lesser doom modifications (hence my link in the last post).
You can fix the wads that you listed with a wad editor like deutex and just scale the graphics that are oversized (larger then 320x200). Someone named SERER0kR fixed the starwars wad and posted it on the wiki, but it was recently removed as it violates lucas arts copyright as do most (all?) of those wads you listed (by other copyright holders).
The pwad (patch wad) and iwad (main wad - can replace doom[1,2,u].wad) may be created differently hence inconsistent results.
As a final note, neither prboom (software renderer) or the original doom will run these wads - I don't know about zdoom, jdoom, or legacy (they probably will as the OpenGL renderer handles graphics in a completely different way from the doom software renderer).