I realised why it wasn't working to receive events after I upgraded to the latest EventGhost, obviously it overwrote your latest one with an older version! /facepalm
I reloaded 8357639 and surprise, surprise it's receiving events again.

I think the best options are not to split it at all, or use a '.', eg. SLI.02, MVL.2D. As far as I understand it, this allows for triggering an event type, if you just use SLI, or a more specific event of SLI.02.
Even though copying and pasting OnkyoISCP.SLI '02', instead of dragging, does get the value to show up in the EventGhost configuration tree, it doesn't actually work to trigger a macro.
Cheers
Edit: I found another page with some code for the Vera plugin, which works for me. It looks very similar to me, but maybe there's some nuances you can see:
http://forum.micasaverde.com/index.php/ ... l#msg679210x49 0x53 0x43 0x50 0x0 0x0 0x0 0x10 0x0 0x0 0x0
0x8 0x1 0x0 0x0 0x0 0x21 0x31 0x4d 0x56 0x4c 0x33 0x31 0xd (ISCP############!1MVL31\r) <0x9c13>
& here's a Wireshark capture of EG sending MVL31 too:
char peer1_0[] = {
0x49, 0x53, 0x43, 0x50, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
0x06, 0x01, 0x00, 0x00, 0x00, 0x21, 0x31, 0x4d, 0x56, 0x4c, 0x33, 0x31, 0x0d };
viewtopic.php?f=10&t=2964&start=15#p21377 I compared similar things here and once more the 0x08 (which works for Oyremote & Vera), instead of 0x06 has shown up. Is this number the header size? Or am I way off?