To use this tool you just need the S&K PC Collection (and in rare cases a VB6 runtime DLL). Nothing more.
No midi1to0, (de-)compressor or Resource Hacker. It's all built in.
And best of all: It makes it very easy to import looped MIDIs. You only need to set the loop markers correctly, the tool does the rest for you. (I.e. no Hex-Editing needed)
(I must admit that I could've uploaded the tool last week, because it was basically finished, but I delayed it because of the extra import features.)
Download is here (source is here).
The readme includes a How-To for the import/export of MIDI files.
P.S.: I want to see some music mods for S&K PC!
EDIT: Updated links for v1.1. See readme for details.
EDIT2: Updated links again - a typo caused a stupid bug