Thanks for the reply

Here's mamewah launching fine (without re-naming the shortcuts):
8/19/2009 1:31:59 PM MAMEWAH v1.63 launched
8/19/2009 1:31:59 PM Cursor scheme: Windows Default, Arrow: (None), Wait: (None), AppStarting: (None)
8/19/2009 1:31:59 PM Desktop colour: 0
8/19/2009 1:31:59 PM Wallpaper filename:
8/19/2009 1:31:59 PM Desktop display mode: 1024x600 @ 60Hz, 32bit colour
8/19/2009 1:31:59 PM Decimal symbol: '.'
8/19/2009 1:31:59 PM Games list read: doujin-0.lst
8/19/2009 1:32:00 PM Mode 800 x 600 @ 60Hz, 16bit colour selected after 2 attempt(s) at 1/2 second intervals.
8/19/2009 1:32:00 PM Layout selected: C:\mamewah163\config\doujin\\layout.lay
8/19/2009 1:32:00 PM No. joystick devices attached: 0
8/19/2009 1:32:00 PM Ctrlr file selected: C:\mamewah163\config\mamewah.cfg
8/19/2009 1:32:00 PM Keyboard enabled
8/19/2009 1:32:06 PM List generation started...
8/19/2009 1:32:06 PM List generation finished
8/19/2009 1:32:06 PM Games list read: doujin-0.lst
8/19/2009 1:32:51 PM Mode 1024 x 600 @ 60Hz, 32bit colour selected after 1 attempt(s) at 1/2 second intervals.
8/19/2009 1:33:03 PM MAMEWAH quit
And here, after re-naming the shortcuts:
8/19/2009 1:34:37 PM MAMEWAH v1.63 launched
8/19/2009 1:34:37 PM Cursor scheme: Windows Default, Arrow: (None), Wait: (None), AppStarting: (None)
8/19/2009 1:34:37 PM Desktop colour: 0
8/19/2009 1:34:37 PM Wallpaper filename:
8/19/2009 1:34:37 PM Desktop display mode: 1024x600 @ 60Hz, 32bit colour
8/19/2009 1:34:37 PM Decimal symbol: '.'
8/19/2009 1:34:37 PM Games list read: doujin-0.lst
8/19/2009 1:34:38 PM Mode 800 x 600 @ 60Hz, 16bit colour selected after 2 attempt(s) at 1/2 second intervals.
8/19/2009 1:34:38 PM Layout selected: C:\mamewah163\config\doujin\\layout.lay
8/19/2009 1:34:39 PM No. joystick devices attached: 0
8/19/2009 1:34:39 PM Ctrlr file selected: C:\mamewah163\config\mamewah.cfg
8/19/2009 1:34:39 PM Keyboard enabled
8/19/2009 1:35:00 PM List generation started...
8/19/2009 1:35:00 PM List generation finished
8/19/2009 1:35:00 PM Games list read: doujin-0.lst
8/19/2009 1:35:37 PM Mode 1024 x 600 @ 60Hz, 32bit colour selected after 1 attempt(s) at 1/2 second intervals.
8/19/2009 1:35:50 PM MAMEWAH quit
Note: the laptop I'm testing this on has a screen res. of 1024x600, but this behavior happens on my cab setup with a CRT monitor as well.
Strange thing; if I re-name the shortcuts to, for example: "EtherVapor.lnk" they work just fine .. anything else, and the system slows to a crawl, and when I try to launch a game, it hangs and dumps me back to mamewah, and everthing is super-slow until I exit mamewah.
I also tried setting the folder to "hide known file extensions" and same thing happens.
Running WinXP home, on both the laptop and the PC in my cab.
... very strange indeed ...