Hey!
Just thought I'd share how to get Trinity Rescue Kit working by booting the ISO from Grub4dos.
title Trinity Rescue Kit - ISO
map --mem (hd0,0)/trinity-rescue-kit.3.3-build-334.iso (hd32)
map --hook
chainloader (hd32)
boot
On boot, it asks you where TRK is, and I reply sda1 since I am booting off USB. Might be different. I'm not sure if you need to unpack the /trk folder from the ISO in order for it to work.