You can preset any res you like by adding a line at the beginning of pecmd.ini.
DISP W1024 H768 B32 F60
If you mean in the pecmd tray menu, you may be able to override it. I haven't tested it though.
E'G if you want ctrl+alt+a to launch notepd, the pecmd.ini entry would be:
HOTK Ctrl + Alt + A,EXEC NOTEPAD.EXE
pecmd 88.01 versions attached pecmd88.01-en-menu.zip
(839.42 kB - downloaded 118 times.)