But today is your lucky day, friend.
- Find your PCSX2 INI directory
This is the same place your memory cards are by default, just up a folder. PCSX2 1.4.0 called it "inis_1.4.0" instead of "inis". - Make the INI file
Or you've made it before, have it already because of other reasons, blah blah blah. Skip this if you already see "PCSX2_keys.ini" in that folder.
Right-click! Make a text file! Call it "PCSX2_keys.ini"! Ignore Windows telling you you're a bad person for renaming the file extension! - Choose a new keybind
Let's open that file up and add a new line, starting with "Sys_Suspend="
(Linux users and people on newer versions of PCSX2 may want to try "Sys_SuspendResume" instead)
Now, what key do you want to use?
The PCSX2 wiki has a page on how some special keys are written(and other things you can change from their defaults), so check that just in case. :) - Open PCSX2 and bask in your glory